CN112583476B

CN112583476B - Optical network terminal and optical fiber testing method

Info

Publication number: CN112583476B
Application number: CN201910926846.0A
Authority: CN
Inventors: 杨素林; 曾小飞; 林华枫
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2022-05-17
Anticipated expiration: 2039-09-27
Also published as: CN112583476A

Abstract

The application discloses an optical network terminal, an optical fiber testing method and a terminal, and belongs to the technical field of optical networks. The optical network terminal only comprises the processing component and the optical component, and the optical component only comprises the first transceiver unit without comprising a plurality of units only having receiving or transmitting functions, namely, the optical component provided by the embodiment of the application has fewer components, so that the manufacturing process is relatively simple, and the manufacturing cost of the optical component can be reduced.

Description

Optical network terminal and optical fiber testing method

Technical Field

The present application relates to the field of optical network technologies, and in particular, to an optical network terminal, an optical fiber testing method, and a terminal.

Background

In order to reduce the maintenance cost of bandwidth access, a Passive Optical Network (PON) may be used for bandwidth access, and during operation and maintenance of the PON, an Optical Network Terminal (ONT) in the PON network may be used to test an optical fiber in the PON, so as to determine whether the optical fiber in the PON has a fault according to a test result.

In order to implement a test in the ONT, an optical module in the ONT may include a plurality of units, where each unit is configured to have a different function, and taking the optical module composed of the units 1 to 4 as an example, when performing the test, the unit 1 receives a first target electrical signal for the test, performs an electrical-to-optical conversion on the first target electrical signal, obtains a first target optical signal, and transmits the first target optical signal to an optical fiber. When the optical fiber transmits the first target optical signal, the optical fiber reflects the reflected signal of the first optical signal to the unit 2, and then the unit 2 performs photoelectric conversion on the received reflected signal to obtain a second target electrical signal, outputs the second target electrical signal to the sampling component in the ONT, performs sampling processing on the second target electrical signal by the sampling component, and tests the optical fiber based on the sampling result. When the test is not performed, the unit 3 receives a third target electrical signal output by a Media Access Control (MAC) processor of the ONT, performs electro-optical conversion on the third target electrical signal to obtain a second target optical signal, and transmits the second target optical signal to the second directional optical fiber. When the optical fiber connected to the ONT transmits the third target optical signal to the ONT, the unit 4 receives the third target optical signal, performs photoelectric conversion on the third target optical signal to obtain a third target electrical signal, sends the third target electrical signal to the MAC processor, and the MAC processor processes the third target electrical signal.

Since the optical module at least includes four units such as the units 1 to 4, the manufacturing process of the optical module is very complicated to manufacture the four units into one optical module, which results in high manufacturing cost of the optical module.

Disclosure of Invention

The embodiment of the application provides an optical network terminal, an optical fiber testing method and a terminal, which can reduce the manufacturing cost of an optical component. The technical scheme is as follows:

in a first aspect, an optical network terminal is provided, where the optical network terminal includes an optical component and a processing component, where the processing component is configured to output a first electrical signal to the optical component, where the first electrical signal includes a test electrical signal for testing or a non-test electrical signal for carrying service data;

the optical assembly comprises a first transceiver unit, and the first transceiver unit is connected with the processing assembly;

the first transceiver unit is configured to receive the first electrical signal output by the processing component, perform electrical-to-optical conversion on the first electrical signal to obtain a first optical signal with a first wavelength, and transmit the first optical signal to an optical fiber connected to the optical network terminal, and the first transceiver unit is further configured to receive a second optical signal with the first wavelength returned by the optical fiber, perform electrical-to-optical conversion on the second optical signal to obtain a second electrical signal, and output the second electrical signal to the processing component.

The optical network terminal in the above manner only includes the processing component and the optical component, and the optical component only includes the first transceiver unit, and does not need to include a plurality of units having only receiving or transmitting functions, that is, the optical component provided in the embodiment of the present application has fewer components, so that the manufacturing process is relatively simple, and the manufacturing cost of the optical component can be reduced.

In one possible implementation, the first transceiver unit includes a first laser and a first detector;

the first laser is used for receiving the first electric signal output by the processing assembly, performing electro-optical conversion on the received first electric signal to obtain a first optical signal, and transmitting the first optical signal;

the first detector is arranged on an emission optical path of the first laser and is used for transmitting the first optical signal;

the first detector is further configured to receive a second optical signal with the first wavelength returned by the optical fiber, perform photoelectric conversion on the second optical signal to obtain a second electrical signal, and output the second electrical signal to the processing component.

In a possible implementation manner, the first detector is further configured to detect the first optical signal and output a third electrical signal, and the processing component detects whether the first laser is faulty or not according to the third electrical signal.

Based on the possible implementation manner, the processing component detects whether the first laser fails according to the fourth electrical signal, so that the processing component of the optical network terminal can directly monitor the first laser without manual monitoring, and the maintenance cost of the optical network terminal is reduced.

In one possible implementation, the first transceiver unit includes a second laser, a coupler, and a second detector;

the second laser is used for receiving the first electric signal output by the processing component, performing electro-optical conversion on the received first electric signal to obtain a first optical signal, and transmitting the first optical signal;

the coupler is arranged on an emitting light path of the second laser, and the coupler is used for transmitting the first optical signal and reflecting the second optical signal;

the second detector is arranged on a reflected light path of the coupler, and is used for performing photoelectric conversion on the second optical signal to obtain a second electric signal, and outputting the second electric signal to the processing component.

In a possible implementation manner, the optical assembly further includes a second receiving unit, the second receiving unit is configured to detect an optical signal with a second wavelength transmitted through the optical fiber and output a fourth electrical signal, and the processing assembly detects whether the optical fiber is faulty or not according to the fourth electrical signal.

Based on the possible implementation manner, the processing component detects whether the optical fiber has a fault according to the fourth electrical signal, so that whether the optical fiber has the fault can be directly monitored by the processing component of the optical network terminal without manual monitoring, and the maintenance cost of the optical network terminal is reduced.

In one possible implementation, the optical assembly further comprises a first wavelength division multiplexer;

the first wavelength division multiplexer is disposed on an optical path of the first transceiver unit, and the first wavelength division multiplexer is configured to transmit the first optical signal and reflect the second optical signal.

In one possible implementation, the processing component includes a processor and a sampling unit;

the processor is configured to output the first electrical signal to the first transceiver unit, and output a sampling instruction to the sampling unit, where the sampling instruction is used to instruct to sample the second electrical signal;

the sampling unit is used for receiving the second electric signal output by the first transceiving unit, sampling the second electric signal according to the sampling instruction to obtain a sampling result, and testing the optical fiber based on the sampling result.

In a second aspect, an optical network terminal is provided, where the optical network terminal includes an optical component and a processing component, and the processing component is configured to output, to the optical component, a test electrical signal for testing or a non-test electrical signal for carrying service data;

the optical assembly comprises a first transmitting unit and a third receiving unit, and the first transmitting unit and the third receiving unit are both connected with the processing assembly;

the first transmitting unit is configured to receive the test electrical signal output by the processing component, perform electro-optical conversion on the test electrical signal to obtain a test optical signal with a third wavelength, and output the test optical signal to an optical fiber connected to the optical network terminal;

the first transmitting unit is further configured to receive the non-test electrical signal output by the processing component, perform electro-optical conversion on the non-test electrical signal to obtain a non-test optical signal with a first wavelength, and output the non-test optical signal to an optical fiber connected to the optical network terminal;

the third receiving unit is configured to receive the target optical signal of the third wavelength returned by the optical fiber, perform photoelectric conversion on the target optical signal to obtain a target electrical signal, and output the target electrical signal to the processing component.

The optical network terminal in the above manner only includes the processing component and the optical component, and the optical component only includes the first transmitting unit and the third receiving unit, and does not need to include a plurality of units having only receiving or transmitting functions, that is, the optical component provided in the embodiment of the present application has fewer components, and the manufacturing process thereof is relatively simple, so that the manufacturing cost of the optical component can be reduced.

In one possible implementation, the first transmission unit includes a third laser, a fourth laser, and a second wavelength division multiplexer;

the third laser is used for receiving the test electrical signal output by the processing assembly, performing electro-optical conversion on the received test electrical signal to obtain the test optical signal, and transmitting the test optical signal;

the fourth laser is used for receiving the non-test electrical signal output by the processing assembly, performing electro-optical conversion on the received non-test electrical signal to obtain a non-test optical signal, and transmitting the non-test optical signal;

the second wavelength division multiplexer is disposed on an emission optical path of the third laser and an emission optical path of the fourth laser, the second wavelength division multiplexer is configured to transmit the test optical signal and the non-test optical signal and reflect the target optical signal, and the third receiving unit is disposed on a reflection optical path of the second wavelength division multiplexer.

In one possible implementation, the first transmission unit includes a fifth laser and a sixth laser;

the fifth laser is used for receiving the test electrical signal output by the processing assembly, performing electro-optical conversion on the received test electrical signal to obtain the test optical signal, and transmitting the test optical signal;

the sixth laser is arranged on the emitting light path of the fifth laser, and the sixth laser is used for transmitting the test light signal;

the sixth laser is further configured to receive the non-test electrical signal output by the processing component, perform electro-optical conversion on the received non-test electrical signal to obtain the non-test optical signal, and emit the non-test optical signal.

In one possible implementation, the first transmission unit includes a seventh laser;

the seventh laser is used for receiving the test electric signal or the non-test electric signal output by the processing component;

the seventh laser is further configured to perform electro-optical conversion on the received test electrical signal to obtain the test optical signal, and emit the test optical signal;

the seventh laser is further configured to perform electro-optical conversion on the received non-test electrical signal to obtain the non-test optical signal, and to emit the non-test optical signal.

In one possible implementation, the third receiving unit includes a filter and a third detector;

the filter is used for receiving the optical signal, filtering the received optical signal to obtain the target optical signal, and transmitting the target optical signal to the third detector;

the third detector is arranged on a transmission light path of the filter, and is used for receiving the target optical signal transmitted by the filter, performing photoelectric conversion on the received target optical signal to obtain a target electrical signal, and outputting the target electrical signal to the processing component.

In a possible implementation manner, the optical module further includes an optical splitter, where the optical splitter is disposed on a transmission optical path of the optical fiber, and the optical splitter is configured to receive an optical signal, split the optical signal according to a preset splitting ratio to obtain a first split optical signal corresponding to the first transmitting unit and a second split optical signal corresponding to the third receiving unit, output the first split optical signal to the first transmitting unit, and output the second split optical signal to the third receiving unit.

In a possible implementation manner, the third receiving unit is further configured to receive a target optical signal with a third wavelength, and output a fifth electrical signal, and the processing component detects whether the optical fiber is faulty according to the fifth electrical signal.

In the possible mode, the processing assembly detects whether the optical fiber has a fault according to the sixth electric signal without manual monitoring, so that the maintenance cost is reduced.

the processor is used for outputting the test electric signal and the non-test electric signal to the first transmitting unit and outputting a sampling instruction to the sampling unit, wherein the sampling instruction is used for instructing the sampling processing of the target electric signal;

the sampling unit is used for receiving the target electric signal output by the third receiving unit, sampling the target electric signal according to the second sampling instruction to obtain a sampling result, and testing the optical fiber based on the sampling result.

In a third aspect, an optical fiber testing method is provided, which is applied to an optical network terminal, where the optical network terminal includes an optical component and a processing component, the optical component includes a first transceiver unit, and the method includes:

the processing component outputs a test electrical signal to the first unit, wherein the test electrical signal is used for indicating to test an optical fiber connected with the network terminal;

the first transceiver unit receives the test electrical signal, performs electro-optical conversion on the test electrical signal to obtain a test optical signal with a first wavelength, and outputs the test optical signal to the optical fiber;

when the test optical signal is transmitted in the optical fiber, the optical fiber returns a second optical signal with the first wavelength to a first transceiver unit;

the first transceiver unit receives the second optical signal, performs photoelectric conversion on the second optical signal to obtain a second electrical signal, and outputs the second electrical signal to the processing assembly;

the processing component tests the optical fiber based on the second electrical signal.

The method can directly use the first transceiver unit and the processing component in the optical network terminal to complete the test process of the optical fiber, and does not need to use equipment except the PON to test the optical fiber in the PON, thereby simplifying the detection process and reducing the detection cost.

In one possible implementation, the optical assembly further includes a second receiving unit, and the method further includes:

the optical fiber transmits optical signals with a second wavelength to the second receiving unit;

the second receiving unit receives the optical signal, performs photoelectric conversion on the optical signal to obtain a sixth electrical signal, and outputs the sixth electrical signal to the processing assembly.

In a fourth aspect, an optical fiber testing method is provided, which is applied to an optical network terminal, where the optical network terminal includes an optical component and a processing component, the optical component includes a first transmitting unit and a third receiving unit, and the method includes:

the processing component outputs a test electrical signal to the first transmitting unit, wherein the test electrical signal is used for indicating that an optical fiber connected with the network terminal is tested;

the first transmitting unit receives the test electrical signal, performs electro-optical conversion on the test electrical signal to obtain a test optical signal with a third wavelength, and transmits the test optical signal to the optical fiber;

when the test optical signal is transmitted in the optical fiber, the optical fiber returns the target optical signal of the third wavelength to the third receiving unit;

the third receiving unit receives the target optical signal, performs photoelectric conversion on the target optical signal to obtain a target electrical signal, and outputs the target electrical signal to the processing assembly;

the processing component tests the optical fiber based on the target electrical signal.

According to the method, the first transmitting unit, the third receiving unit and the processing assembly in the optical network terminal can be directly used for completing the test process of the optical fiber, and equipment except the PON is not needed for testing the optical fiber in the PON, so that the detection process is simplified, and the detection cost is reduced.

In a fifth aspect, there is provided an optical fiber testing method applied to an optical network terminal including an optical component, the method including:

outputting a test electrical signal to the optical component, performing electro-optical conversion on the test electrical signal by the optical component to obtain a first target test optical signal with a target wavelength, and outputting the first target test optical signal to an optical fiber connected with the optical network terminal, wherein the test electrical signal is used for indicating to test the optical fiber;

receiving a target test electrical signal output by the optical component, wherein the target test electrical signal is obtained by performing photoelectric conversion on a second target test optical signal with the target wavelength returned by the optical fiber by the optical component;

testing the optical fiber based on the target test electrical signal.

The method can directly use the optical component and the processing component in the optical network terminal to complete the test process of the optical fiber, and does not need to use equipment except the PON to test the optical fiber in the PON, thereby simplifying the detection process and reducing the detection cost.

In one possible implementation, before outputting the test electrical signal light to the optical component, the method further includes:

and testing the optical assembly so that the optical assembly performs electro-optical conversion on the test electrical signal to obtain a first target test optical signal with a target wavelength, and performing photoelectric conversion on a second target test optical signal with the target wavelength returned by the optical fiber.

Based on the possible implementation manner, by performing test setting before starting testing, the influence on the first test target optical signal can be reduced, and the precision of the test result can be further improved.

In a sixth aspect, a terminal is provided, where the optical network terminal includes a processor and a memory, where the memory stores at least one instruction, and the instruction is loaded by the processor and executed to implement the operations performed by the optical fiber testing method according to the fifth aspect or any one of the optional manners of the fifth aspect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of an optical network terminal according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a first transceiver unit according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a first transceiver unit according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of an optical network terminal according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an optical network terminal according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 7 is a flow chart of a method for testing optical fibers according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram of a PON system according to an embodiment of the present application;

FIG. 9 is a flow chart of a method for testing optical fibers according to an embodiment of the present disclosure;

fig. 10 is a flowchart of an optical fiber testing method according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of an optical network terminal according to an embodiment of the present disclosure, referring to fig. 1, the optical network terminal includes an optical component 101 and a processing component 102, where the processing component 102 is configured to output a first electrical signal to the optical component 101, where the first electrical signal includes a test electrical signal for testing or a non-test electrical signal for carrying service data, where the test electrical signal is used to instruct to test an optical fiber connected to the optical network terminal, and the non-test electrical signal is any electrical signal output by the processing component 102 except the test electrical signal, and the test electrical signal and the non-test electrical signal are both electrical signals, where the electrical signal may be a current signal or a voltage signal, and a form of the electrical signal is not specifically limited in the embodiment of the present disclosure.

The optical assembly 101 comprises a first transceiver unit 11, and the first transceiver unit 11 is connected with the processing assembly 102;

the first transceiver unit 11 is configured to receive the first electrical signal output by the processing component, perform electrical-to-optical conversion on the first electrical signal to obtain a first optical signal with a first wavelength, and transmit the first optical signal to an optical fiber connected to the optical network terminal, and the first transceiver unit 11 is further configured to receive a second optical signal with the first wavelength returned by the optical fiber, perform optical-to-electrical conversion on the second optical signal to obtain a second electrical signal, and output the second electrical signal to the processing component 102.

The working principle of the optical network terminal may be as follows: the processing component 102 outputs a first electrical signal to the first transceiver unit 11, when the first transceiver unit 11 receives the first electrical signal, performs photoelectric conversion on the first electrical signal to obtain a first optical signal with a first wavelength, and outputs the first optical signal to an optical fiber connected to an optical network terminal, when the first optical signal is transmitted in the optical fiber, the optical fiber scatters or reflects the first optical signal under the influence of the material of the optical fiber, so that the optical fiber returns a second optical signal with the first wavelength to the first transceiver unit 11, when the first transceiver unit 11 receives the second optical signal, performs photoelectric conversion on the second optical signal to obtain a second electrical signal, and outputs the second electrical signal to the processing component 102, and the processing component 102 processes the second electrical signal.

In some embodiments, the optical assembly further includes a second receiving unit 12, the second receiving unit 12 is connected to the processing assembly 102, and the second receiving unit 12 is configured to receive an optical signal with a second wavelength transmitted through an optical fiber, perform photoelectric conversion on the optical signal to obtain a sixth electrical signal, and output the sixth electrical signal to the processing assembly 102. The output interface of the second receiving unit 12 is connected to the first input interface of the processor assembly 102, and the output interface of the second receiving unit 12 is used for outputting the sixth electrical signal to the first input interface of the processor assembly 102. When the normal service is performed, the optical fiber may transmit an optical signal with a second wavelength to the optical network terminal, where the optical signal with the second wavelength may be any optical signal transmitted by the PON to the optical network terminal through the optical fiber; when the optical signal with the second wavelength is received by the second receiving unit of the optical network terminal, the second receiving unit performs photoelectric conversion on the optical signal to obtain a sixth electrical signal, and outputs the sixth electrical signal to the first input interface of the processing component 102 through the output interface of the second receiving unit 12, and the processing component 102 processes the sixth electrical signal.

As can be known from the operation principle of the optical network terminal, the wavelengths of the first optical signal and the second optical signal passed by the first transceiver unit 11 are both the first wavelength, that is, the wavelengths of the first optical signal corresponding to the test electrical signal and the first optical signal corresponding to the non-test electrical signal are both the first wavelength, where the first wavelength may be 13110nm or 1270nm, and the wavelength of the optical signal transmitted by the optical fiber to the optical network terminal may be the second wavelength, where the second wavelength is 1490nm or 1577 nm.

In some embodiments, the optical component 101 further includes a first Wavelength Division Multiplexer (WDM) 103, the first WDM13 is disposed on the optical path of the first transceiver unit 11, and the first WDM13 is configured to transmit the first optical signal and reflect the second optical signal.

Considering that the optical module 101 may output the first optical signal to the optical fiber and may also receive the optical signal from the optical fiber, in order to indicate the transmission direction of each optical signal passing through the optical module 101, the optical signal output by the optical module 101 to the optical fiber may be referred to as an uplink signal, and the optical signal received by the optical module 101 from the optical fiber may be referred to as a downlink signal, where the wavelength of the uplink signal may be referred to as an uplink wavelength and the wavelength of the downlink signal may be referred to as a downlink wavelength.

Considering that both the first transceiver unit 11 and the second receiver unit 12 can receive the signal from the optical fiber, but the wavelengths of the optical signals received by the two units are different, in order to allow the two units to receive the optical signals required by the two units, the second receiver unit 12 may be disposed on the reflected light path of the first WDM13, and the first WDM13 is further configured to reflect the optical signal of the second wavelength transmitted by the optical fiber to the second receiver unit 12, so that the second receiver unit 12 converts the optical signal of the second wavelength into a sixth electrical signal.

Specifically, when the first WDM13 transmits the first optical signal emitted from the first transceiver unit 11 to the optical fiber, reflects the second optical signal returned through the optical fiber to the first transceiver unit 11, and reflects the optical signal of the second wavelength transmitted through the optical fiber to the second receiver unit 12. It should be noted that, the first WDM13 may transmit the first optical signal to the optical fiber according to the first transmittance, reflect the second optical signal to the first transceiver 11 according to the first reflectance, and transmit the optical signal with the second wavelength to the second receiver 12 according to the second reflectance, and the first transmittance, the first reflectance, and the second reflectance are not specifically limited in this embodiment of the application.

The optical network terminal may further include an optical interface 103, and the optical interface 103 is connected to the optical fiber and disposed on an optical path of the first WDM13 so that the first WDM13 can transmit the first optical signal to an incoming optical fiber through the optical interface 103 and transmit the optical signal to the first WDM13 through the optical interface 103.

The above is a description of the connection mode between each component of the entire optical network terminal and the function of each component, and the following description is made on the internal structure of the optical component 101 in order to further embody the operation principle of the optical component 101.

As can be seen, the first transceiver unit 11 is a unit integrating transceiver function, and for further explaining a specific structure and an operating principle of the first transceiver unit 11, refer to a schematic structural diagram of the first transceiver unit 11 provided in the embodiment of the present application shown in fig. 2, where the first transceiver unit 11 includes a first laser 111 and a first detector 113;

the first laser 111 is configured to receive a first electrical signal output by the processing component 102, perform electro-optical conversion on the received first electrical signal to obtain a first optical signal, and transmit the first optical signal;

a first detector 113 is disposed on an emission optical path of the first laser 111, the first detector 113 being for transmitting the first optical signal;

the first detector 113 is further configured to receive a second optical signal with the first wavelength returned through the optical fiber, perform photoelectric conversion on the second optical signal to obtain a second electrical signal, and output the second electrical signal to the processing component 102.

The connection between the first transceiver unit 11 and the processing component 13 may be as follows: an input interface of the first laser 111 is connected with a first output interface of the processing component 102, and the input interface of the first laser 111 is used for receiving a first electrical signal output by the first output interface; the output interface of the first detector 113 is connected to the second input interface of the processing component, and the output interface of the first detector 113 is used for outputting the second electrical signal to the second input interface.

The operating principle of the first transceiving unit 11 may be: the processing component 102 outputs a first electrical signal to an input interface of the first laser 111 through the first output interface, and after the first laser 111 receives the first electrical signal, performs electro-optical conversion on the first electrical signal to obtain a first optical signal, and transmits the first optical signal to the first detector 113, where because the first detector 113 is disposed on a transmission light path of the first laser 111, the first detector 113 may obtain the first optical signal transmitted by the first laser 111, and transmit the obtained first optical signal to the optical fiber; when the optical fiber returns the second optical signal to the first detector 113, the first detector 113 performs photoelectric conversion on the second optical signal to obtain a second electrical signal, and outputs the second electrical signal to the second input interface of the processing component 102 through the output interface of the first detector 113.

The first laser 111 may be a distributed feedback laser (DFB), or may also be an External Modulation Laser (EML), and the first detector 113 may be a Photodetector (PD), or may also be another detector for photoelectric conversion, where the first laser 111 and the first detector 113 are not specifically limited in this embodiment of the application.

It should be noted that, when the first laser 111 has a forward bias voltage with a first preset value (the positive electrode voltage of the first laser 111 is higher than the negative electrode voltage), the first laser 111 may convert the first electrical signal into the first optical signal, thereby completing the electrical-to-optical conversion of the first electrical signal. When the first detector 113 has a negative bias voltage of a second preset value (the negative voltage of the first detector 113 is higher than the positive voltage), the first detector 113 may convert the second optical signal into a second electrical signal, thereby completing the photoelectric conversion of the second optical signal.

In some embodiments, the optical network terminal may further include a first bias voltage control circuit, where the first bias voltage control circuit may be connected to the first laser 111 and the first detector 113, and the first bias voltage control circuit is configured to provide a first preset value of positive bias voltage for the first laser 111 and provide a second preset value of negative bias voltage for the first detector 113. The first bias voltage control circuit may be packaged in the processing component 102 or the optical component 101, or may be an independent component other than the processing component 102 and the optical component 101.

Since the first detector 113 is not only configured to transmit the first optical signal but also configured to perform photoelectric conversion on the second optical signal, and the optical fiber can only receive the optical signal and cannot receive the electrical signal, when the first detector 113 receives the first optical signal, the first bias voltage control circuit may provide a negative bias voltage or a positive bias voltage smaller than a second preset value for the first detector 113 to prevent the first detector 113 from performing photoelectric conversion on the first optical signal. Specifically, the first bias voltage control circuit may provide a negative bias voltage or a positive bias voltage smaller than a second preset value for the first detector 113 before the processing component 102 sends the first electrical signal, and after a first preset time period, the first bias voltage control circuit provides the negative bias voltage of the second preset value for the first detector 113, where the first preset time period is a difference between a time when the processing component 102 sends the first electrical signal and a time when the first detector 113 receives the second optical signal. In addition, when the first detector 113 performs photoelectric conversion on the second optical signal, the first bias voltage control circuit may provide the first laser 111 with a positive bias voltage or a negative bias voltage smaller than a first preset value, so as to reduce the influence of the first laser 111 on the first detector 113.

It should be noted that the first detector 113 is further configured to detect the first optical signal and output a third electrical signal, and the processing component 102 detects whether the first laser 111 fails according to the fourth electrical signal. The first optical signal is a signal generated by the first laser 111, and thus parameters such as the transmission power and the extinction ratio of the first optical signal can reflect whether the first laser 111 is faulty, for example, when the transmission power of the first optical signal is too small or too large, or when the extinction ratio of the first optical signal is too small or too large, it indicates that the first laser 111 is faulty. Considering that the first detector 113 transmits the first optical signal, when the first detector 113 transmits the first optical signal, the first optical signal may be detected, the magnitude of the transmission power and the magnitude of the extinction ratio of the first optical signal may be detected, the third electrical signal may be used to indicate the magnitude of the transmission power and the magnitude of the extinction ratio of the first optical signal, and the fourth electrical signal may be output to the processing component 102, and the processing component 102 may detect whether the first laser 111 fails according to the fourth electrical signal.

Similarly, the second receiving unit 12 is further configured to detect an optical signal with a second wavelength transmitted through the optical fiber, and output a fourth electrical signal, and the processing component 102 detects whether the optical fiber fails according to the fourth electrical signal. The optical signal with the second wavelength is an optical signal transmitted by an optical fiber, and considering that the second receiving unit 12 receives the optical signal transmitted by the optical fiber, after the second receiving unit 12 receives the optical signal, the received optical signal is detected to obtain a fourth electrical signal, the fourth electrical signal is used for indicating a loss condition of the optical signal during transmission in the optical fiber, and the fourth electrical signal is output to the processing component 102, and the processing component 102 detects whether the optical fiber fails according to the loss condition of the optical signal indicated by the fourth electrical signal during transmission in the optical fiber.

In some embodiments, the first transceiver unit 11 may use the coupler 114 to distinguish optical signals in different directions in consideration of different transmission directions of the first optical signal and the second optical signal, and for further explaining a specific structure and an operation principle of such first transceiver unit 11, refer to a schematic structural diagram of the first transceiver unit 11 provided in the embodiment of the present application shown in fig. 3, where the first transceiver unit 11 includes the second laser 112, the coupler 114, and the second detector 116;

the second laser 112 is configured to receive the first electrical signal output by the processing component 102, perform electro-optical conversion on the received first electrical signal, obtain a first optical signal, and emit the first optical signal;

a coupler 114 is disposed on the emitted optical path of the second laser 112, the coupler 114 being configured to transmit the first optical signal and reflect the second optical signal;

a second detector 116 is disposed on the reflected light path of the coupler 114, the second detector 116 is configured to perform photoelectric conversion on the second optical signal to obtain a second electrical signal, and the second detector 116 is configured to output the second electrical signal to the processing assembly 102.

The connection mode of the first transceiver unit and the processing component may be: an input interface of the second laser 112 is connected with the first output interface of the processing component 102, and the input interface of the second laser 112 is used for receiving the first electrical signal output by the first output interface; the output interface of the second detector 116 is connected to the second input interface of the processing component, and the output interface of the second detector 116 is configured to output the second electrical signal to the second input interface.

The operating principle of the first transceiver unit 11 is as follows: the processing component 102 outputs a first electrical signal to an input interface of the second laser 112 through the first output interface, and after the second laser 112 receives the first electrical signal, performs electro-optical conversion on the received first electrical signal to obtain a first optical signal, and transmits the first optical signal to the coupler 114, and since the coupler 114 is located on a transmission optical path of the second laser 112, the coupler 114 may obtain the first optical signal transmitted by the second laser 112 and transmit the obtained first optical signal to an optical fiber; after the first optical fiber returns the second optical signal to the coupler 114, the coupler 114 reflects the second optical signal to the second detector 116, and since the second detector 116 is located on a reflected light path of the coupler 114, the second detector 116 can obtain the second optical signal reflected by the coupler 114, perform photoelectric conversion on the obtained second optical signal, obtain a second electrical signal, and output the second electrical signal to the second input interface of the processing component 102 through the output interface of the coupler 114.

It should be noted that when the second laser 112 has a forward bias voltage with a first preset value, the second laser 112 may also convert the first electrical signal into a first optical signal, thereby completing the electrical-to-optical conversion of the first electrical signal. When the second detector 116 has a negative bias voltage of a second predetermined value, the second detector 116 may also convert the second optical signal into a second electrical signal, thereby completing the photoelectric conversion of the second optical signal.

The first bias voltage control circuit may further control the voltage of the second laser 112 and the voltage of the second detector 116, and since the second laser 112 and the second detector 116 are not on the same optical path and have no mutual influence, the first bias voltage control circuit may continuously provide the first preset value of the positive bias voltage for the second laser 112 and continuously provide the second preset value of the negative bias voltage for the second detector 116.

It should be noted that the coupler 114 may be an optical splitter or a circulator, when the coupler 114 is an optical splitter, the coupler 114 may partially transmit the first optical signal or partially reflect the second optical signal, and when the coupler 114 is a circulator, the coupler 114 may completely transmit the first optical signal or completely reflect the second optical signal, that is, the coupler 114 may transmit the first optical signal with a third transmittance and reflect the second optical signal with a third reflectance. The coupler 114, the second transmittance, and the third reflectance are not particularly limited in the embodiments of the present application.

In some embodiments, the optical component 101 may further include an amplifying unit, where the amplifying unit is configured to receive the second electrical signal output by the first transceiver 101, perform current/voltage conversion on the received second electrical signal to obtain a first voltage signal, amplify the first voltage signal into a second voltage signal, output the second voltage signal to the processing component 102, and test the optical fiber by the processing component 102 based on the second voltage signal.

In some embodiments, the amplifying unit may include a trans-impedance amplifier (TIA) and at least one amplifier, where the TIA is configured to receive the second electrical signal output by the first transceiver unit 101, perform current/voltage conversion on the first electrical signal to obtain a first voltage signal, and output the first voltage signal to the at least one amplifier; the at least one amplifier is configured to amplify the first voltage signal into a second voltage signal and output the second amplified signal to the processing component 102.

The specific connection structure in the amplification unit may be: an input interface of the TIA is connected with an output interface of the first transceiver unit 11, and is configured to receive a second electrical signal output by the first transceiver unit 101;

at least one amplifier is sequentially connected in series to obtain an amplifier group, an output interface of the TIA is connected with an input interface of a first amplifier in the amplifier group, and the output interface of the TIA is used for outputting a first voltage signal to the input interface of the first amplifier in the amplifier group; the output interface of the last amplifier in the amplifier group is connected to the second input interface of the processing component 102, and the output interface of the last amplifier in the amplifier group is used for outputting the second voltage signal to the second input interface of the processing component 102.

The above is a description of the specific structure of the optical assembly 101, and the following description of the internal structure of the processing assembly 102 is started:

in some embodiments, the processing component 102 comprises a processor 21 and a sampling unit 22;

the processor 21 is configured to output a first electrical signal to the first transceiver unit 11, and output a sampling instruction to the sampling unit 22, where the sampling instruction is used to instruct to perform sampling processing on the second electrical signal;

the sampling unit 22 is configured to receive the second electrical signal output by the first transceiver unit 11, perform sampling processing on the second electrical signal according to the sampling instruction, obtain a sampling result, and test the optical fiber based on the sampling result.

In some embodiments, when the optical assembly comprises the second receiving unit 12, the processor 21 is further configured to receive a sixth electrical signal output by the second receiving unit 12. The connection structure within the process component 102 can be: a first output interface of the processor 21 is connected to an input interface of the first transceiver unit 11, and is configured to output a first electrical signal to the input interface of the first transceiver unit 11; a second output interface of the processor 21 is connected to the first input interface of the sampling unit 22, and is configured to output a sampling instruction to the first input interface of the sampling unit 22; a second input interface of the sampling unit 22 is connected to an output interface of the first transceiver unit 11, and is configured to receive a second electrical signal output by the output interface of the first transceiver unit 11; the input interface of the processor 21 is connected to the output interface of the second receiving unit 12, and is configured to receive the sixth electrical signal output by the output interface of the second receiving unit 12. It should be noted that the sampling unit may be an analog to digital converter (ADC), and the ADC may perform sampling processing on the second electrical signal.

The operating principle of the processing component 102 may be: the processor 21 outputs a first electrical signal to the input interface of the first transceiver unit 11 through the first output interface of the processor 21, so that the first transceiver unit 11 can perform electro-optical conversion on the first electrical signal and output the converted first optical signal to the optical fiber; the processor 21 outputs a sampling instruction to the first input interface of the sampling unit 22 through the second output interface of the processor 21, and the sampling instruction carries the length of the optical fiber to be tested and the sampling time, so that after the sampling unit 22 receives the second electrical signal, the second electrical signal can be sampled according to the length of the optical fiber carried in the sampling instruction and the sampling time, and the optical fiber is tested based on the sampling result. The sampling time may include the time at which sampling begins and the duration of the sampling. The sampling unit 22 may sample the second electrical signal according to the length of the optical fiber carried in the sampling instruction and the sampling time, where the process of sampling the second electrical signal may be: and sampling the second electric signal at the sampling start time included in the sampling time, and terminating the sampling when the length of the optical fiber corresponding to the second electric signal is greater than the length of the optical fiber carried in the sampling instruction, or terminating the sampling when the sampling duration exceeds the sampling duration included in the sampling time. When the output interface of the second receiving unit inputs the sixth electrical signal to the input interface of the processor 21, the processor 21 processes the sixth electrical signal.

In some embodiments, the processor 21 may include a master processor 211 and a slave processor 212, wherein the master processor 211 is configured to output a test instruction to the slave processor 212, and the test instruction is configured to instruct the slave processor 212 to output a test electrical signal;

the slave processor 212 is configured to receive the test instruction output by the master processor 211, output a test electrical signal to the first transceiver unit 11, and output a sampling instruction to the sampling unit 22.

In some embodiments, the processing component 102 further includes a storage unit 23, which is configured to receive a sampling instruction and a storage instruction output from the processor 212, and send the sampling instruction to the sampling unit, where the storage instruction is configured to store the sampling result uploaded by the sampling unit 22 and the test result. If the sampling unit 22 only samples the second electrical signal to obtain a sampling result, but does not test the optical fiber based on the sampling result, after the sampling unit 22 samples the second electrical signal, the sampling unit 22 outputs the sampling result to the storage unit 23, the storage unit 23 stores the current sampling result, and outputs the stored sampling result to the slave processor 212, and the slave processor 212 tests the optical fiber based on the sampling result. When storing the sampling result, the storage unit 23 may store the current sampling result and the optical fiber identifier identifying the optical fiber in an associated manner, so as to represent the sampling result during the test of the optical fiber. If the sampling unit 22 tests the optical fiber based on the sampling result, after the sampling unit tests the optical fiber, the sampling unit 22 outputs the sampling result and the test result to the storage device, the storage unit 23 stores the current sampling result and the current test result, and the storage unit 23 may store the current sampling result, the current test result, and the optical fiber identifier identifying the optical fiber in an associated manner to represent the sampling result and the test result during the optical fiber test.

In some embodiments, the processing assembly 102 further includes a Laser Diode Driver (LDD) 24, the LDD24 is configured to receive the non-test electrical signal output by the main processor 211 and the test electrical signal output by the processor 212, output a first electrical signal to the first transceiver unit 11, and activate the first transceiver unit 11 to convert the first electrical signal into a first optical signal.

In some embodiments, the processing component 102 further includes a Limiting Amplifier (LA) 25, where the LA 25 is configured to receive the sixth electrical signal output by the second receiving unit 12, amplify the sixth electrical signal, and send the amplified sixth electrical signal to the main processor 211, and the main processor 211 processes the amplified sixth electrical signal.

The internal connection structure of the process component 102 may be: the first output interface of the master processor 211 is connected with the first input interface of the slave processor 212, and the first output interface of the master processor 211 is used for outputting a test instruction to the first input interface of the slave processor 212; a first output interface of the slave processor 212 is connected to a first input interface of the LDD24, the first output interface of the slave processor 212 being for outputting a test electrical signal to the first input interface of the LDD 24; a second output interface of the main processor 211 is connected to a second input interface of the LDD24, and the second output interface of the main processor 211 is used for outputting a non-test electrical signal to the second input interface of the LDD 24; an output interface of the LDD24 is connected to an input interface of the first transceiver unit 11, and the output interface of the LDD24 is used for outputting a first electrical signal to the input interface of the first transceiver unit 11; a second output interface of the slave processor 212 is connected to the input interface of the storage unit 23, and the second output interface of the slave processor 212 is configured to output the test instruction and the storage instruction to the input interface of the storage unit 23; a transceiving interface of the storage unit 23 is connected with a transceiving interface of the sampling unit 22, and the transceiving interface of the storage unit 23 is used for outputting a sampling instruction to the transceiving interface of the sampling unit 22 and receiving a sampling result and a test result output by the transceiving interface of the sampling unit 22; an input interface of the sampling unit 22 is connected with an output interface of the first transceiver unit 11, and the input interface of the sampling unit 22 is used for receiving a second electrical signal output by the output interface of the first transceiver unit 11; an input interface of LA 25 is connected to the output interface of the second receiving unit 12, the input interface of LA 25 is configured to receive the sixth electrical signal output by the output interface of the second receiving unit 12, an output interface of LA 25 is connected to the input interface of the main processor 211, and the output interface of LA 25 is configured to output the amplified sixth electrical signal to the input interface of the main processor 211.

At this time, the working principle of the processing component 102 may be: the master processor 211 outputs a test instruction to the first input interface of the slave processor 212 through the first output interface of the master processor 211, where the test instruction may carry a length of an optical fiber to be tested, a test time, and a test mode, where the test time may be a time when the slave processor 212 sends a test electrical signal, and the test mode refers to any mode of testing an optical fiber; when receiving the test instruction, the slave processor 212 outputs a test electrical signal to the first input interface of the LDD24 through the first output interface of the slave processor 212 at the test time carried by the test instruction; the main processor 211 outputs a non-test electrical signal to a second input interface of the LDD24 through a second output interface of the main processor 211; after the LDD24 receives the first electrical signal (test electrical signal or non-test electrical signal); the LDD24 outputs a first electrical signal to the input interface of the first transceiver 11 through the output interface of the LDD24, and activates the first transceiver 11 to convert the first electrical signal into a first optical signal, so that the first transceiver 11 outputs the first optical signal to the optical fiber; after receiving the test instruction, the slave processor 212 further outputs the test instruction and the storage instruction to the input interface of the storage unit 23 through the second output interface of the slave processor 212, and the storage unit 23 outputs the sampling instruction to the transceiving interface of the sampling unit 22 through the transceiving interface of the storage unit 23; after receiving the sampling instruction, the sampling unit 22 waits for receiving the second electrical signal output by the first transceiving unit 11; after the input interface of the sampling unit 22 receives the second electrical signal output by the output interface of the first transceiving unit 11, the sampling unit 22 samples the second electrical signal according to the length and sampling time of the optical fiber carried in the sampling instruction, and tests the optical fiber based on the sampling result; when the input interface of LA 25 receives the sixth electrical signal output by the output interface of second receiving unit 12, LA 25 amplifies the first electrical signal to obtain an amplified sixth electrical signal, LA 25 outputs the amplified sixth electrical signal to the input interface of main processor 211 through the output interface of LA 25, and when the main processor 211 receives the amplified sixth electrical signal, the amplified sixth electrical signal is processed.

The optical network terminal provided by the embodiment of the application only comprises the processing component and the optical component, and the optical component only comprises the first transceiver unit, and does not need to comprise a plurality of units only having receiving or transmitting functions, that is, the optical component provided by the embodiment of the application has fewer components, so that the manufacturing process is relatively simple, and the manufacturing cost of the optical component can be reduced.

The optical component 101 in the optical network terminal includes a first transceiver unit 11 integrating transceiver functions, and in some embodiments, the optical component 101 may further include a unit integrating emission, see fig. 4, which illustrates a schematic structural diagram of the optical network terminal provided in this embodiment of the present application, where the optical network terminal includes an optical component 401 and a processing component 402, and the processing component 402 is configured to output a test electrical signal for testing or a non-test electrical signal for carrying service data to the optical component 401;

the optical assembly 401 includes a first transmitting unit 41 and a third receiving unit 42, and both the first transmitting unit 41 and the third receiving unit 42 are connected to the processing assembly 402;

the first transmitting unit 41 is configured to receive the test electrical signal output by the processing component 402, perform electro-optical conversion on the test electrical signal to obtain a test optical signal with a third wavelength, and output the test optical signal to an optical fiber connected to the optical network terminal;

the first transmitting unit 41 is further configured to receive the non-test electrical signal output by the processing component 402, perform electro-optical conversion on the non-test electrical signal to obtain a non-test optical signal with a first wavelength, and output the non-test optical signal to an optical fiber connected to the optical network terminal;

the third receiving unit 42 is configured to receive the target optical signal with the third wavelength returned through the optical fiber, perform photoelectric conversion on the target optical signal to obtain a target electrical signal, and output the target electrical signal to the processing component 402.

The third wavelength may be 1650nm, and the third wavelength is not limited in the embodiments of the present application. The working principle of the optical network terminal at this time is as follows: when an optical fiber is tested, the processing component 402 outputs a test electrical signal to the first transmitting unit 41, when the first transmitting unit 41 receives the test electrical signal, the test electrical signal is subjected to electro-optical conversion to obtain a test optical signal with a third wavelength, and the test optical signal is output to the optical fiber connected to the optical network terminal, when the optical fiber transmits the test optical signal, the optical fiber scatters or reflects the test optical signal under the influence of the material of the optical fiber, so that the optical fiber returns a target optical signal with the third wavelength to the third receiving unit 42, when the third receiving unit 42 receives the target optical signal, the target optical signal is subjected to electro-optical conversion to obtain a target electrical signal, and the target electrical signal is output to the processing component 402; when the test is not performed, the processing component 402 outputs a non-test electrical signal to the first transmitting unit 41, and when the first transmitting unit 41 receives the non-test electrical signal, performs electro-optical conversion on the non-test electrical signal to obtain a non-test optical signal with a first wavelength, and outputs the non-test optical signal to an optical fiber connected to the optical network terminal, where the non-test optical signal is transmitted in the optical fiber.

In some embodiments, the optical assembly further includes a second receiving unit 12, and since the second receiving unit 12 is described above, the second receiving unit 12 is not described in detail in this embodiment of the present application.

To facilitate the transmission of optical signals between the optical package 401 and the optical fiber, in some embodiments, the optical package 401 further comprises a third wavelength division multiplexer 43;

a third wavelength division multiplexer 43 is disposed on the transmission optical path of the first transmission unit 41, the third wavelength division multiplexer 43 is configured to transmit the test optical signal and the non-test optical signal transmitted by the first transmission unit 41 to the optical fiber, reflect the optical signal transmitted through the optical fiber to the second reception unit 12, and reflect the target optical signal returned through the optical fiber to the third reception unit 42;

the second receiving unit 12 is disposed on a first reflected light path of the optical signal transmitted by the optical fiber reflected by the third wavelength division multiplexer 43, and the third receiving unit 42 is disposed on a second reflected light path of the target optical signal reflected by the third wavelength division multiplexer 43.

In some embodiments, the optical assembly 401 further includes an optical splitter 44, where the optical splitter 44 is disposed on the transmission optical path of the optical fiber, and the optical splitter 44 is configured to receive the optical signal, split the optical signal according to a preset splitting ratio to obtain a first split signal corresponding to the first transmitting and receiving unit 14 and a second split signal corresponding to the third receiving unit 42, output the first split signal to the first transmitting unit, and output the second split signal to the third receiving unit.

It should be noted that, when the third wavelength division multiplexer 43 is not arranged before the optical splitter 44, the optical signal may include an optical signal of the second wavelength, a target optical signal of the third wavelength, and a fourth optical signal of the first wavelength, where the fourth optical signal is an optical signal returned by the optical fiber when the optical fiber transmits a non-test optical signal of the first wavelength. When the third wavelength division multiplexer 43 is disposed in front of the optical splitter 44, the third wavelength division multiplexer 43 reflects the optical signal with the second wavelength to the second receiving unit 12, and transmits the target optical signal with the third wavelength and the fourth optical signal with the first wavelength to the optical splitter 44, at this time, the optical signal received by the optical splitter 44 may include the target optical signal with the third wavelength and the fourth optical signal with the first wavelength, and of course, the optical signal from the optical fiber may also be an optical signal with another wavelength, and therefore, the optical signal received by the optical splitter 44 may also receive an optical signal with another wavelength. When the optical signal received by the optical splitter 44 receives the optical signal, the received optical signal is split according to a preset splitting ratio to obtain a first split optical signal corresponding to the first transmitting and receiving unit 14 and a second split optical signal corresponding to the third receiving unit 42, and the first split optical signal is output to the first transmitting unit and the second split optical signal is output to the third receiving unit. Wherein the preset splitting ratio may be 9: 1, the preset splitting ratio is not specifically limited in the embodiment of the present application.

Since the second split optical signal may include optical signals of other wavelengths in addition to the target optical signal of the third wavelength, and the third receiving unit 42 only needs to process the target optical signal, in some embodiments, the third receiving unit 42 includes a filter 421 and a third detector 422;

the filter 421 is configured to receive the optical signal, filter the received optical signal to obtain a target optical signal, and output the target optical signal to the third detector 422;

the third detector 422 is disposed on the transmission optical path of the filter, and the third detector 422 is configured to receive the target optical signal transmitted by the filter, perform photoelectric conversion on the received target optical signal to obtain a target electrical signal, and output the target electrical signal to the processing component 401.

When the third detector 422 has a negative bias voltage of a third predetermined value, the third detector 422 may convert the target optical signal into a target electrical signal, thereby completing the photoelectric conversion of the target optical signal. In some embodiments, the optical network terminal may further include a second bias voltage control circuit, which may provide a third preset value of negative bias voltage to the third detector 422 so that the third detector 422 may convert the target optical signal into the target electrical signal. The first bias voltage control circuit may be packaged in the processing component 402 or the optical component 401, or may be an independent component other than the processing component 402 and the optical component 401.

In some embodiments, the third receiving unit 42 is further configured to receive the target optical signal with the third wavelength, and output a fifth electrical signal, and the processing component 402 detects whether the optical fiber has a fault according to the fifth electrical signal. Specifically, after the third receiving unit 42 receives the target optical signal, the received target optical signal is detected to obtain a fifth electrical signal, the fifth electrical signal is used to indicate a loss condition of the target optical signal during transmission in the optical fiber, and the fifth electrical signal is output to the processing component 402, and the processing component 402 detects whether the optical fiber fails according to the loss condition of the target optical signal indicated by the fifth electrical signal during transmission in the optical fiber.

Since the first transmitting unit 41 not only needs to perform the electro-optical conversion on the test electrical signal to obtain the test optical signal, but also needs to perform the electro-optical conversion on the non-test electrical signal to obtain the non-test optical signal, and the wavelengths of the test optical signal and the non-test optical signal are different, the first transmitting unit 41 may include two lasers, one laser is used to perform the electro-optical conversion on the test electrical signal to obtain the test optical signal, and the other laser is used to perform the electro-optical conversion on the non-test electrical signal to obtain the non-test optical signal.

In some embodiments, the two lasers may be located on different optical paths, and in one possible implementation, the first transmission unit 41 includes a third laser 411, a fourth laser 413, and a second wavelength division multiplexer 415;

the third laser 411 is configured to receive the test electrical signal output by the processing component 402, perform electro-optical conversion on the received test electrical signal, obtain a test optical signal, and emit the test optical signal;

the fourth laser 413 is configured to receive the non-test electrical signal output by the processing component 402, perform electro-optical conversion on the received non-test electrical signal, obtain a non-test optical signal, and emit the non-test optical signal;

a second wavelength division multiplexer 415 is disposed on an emission optical path of the third laser 411 and an emission optical path of the fourth laser 413, the second wavelength division multiplexer 415 is configured to transmit the test optical signal and the non-test optical signal and reflect the target optical signal, and the third receiving unit 42 is disposed on a reflection optical path of the second wavelength division multiplexer 415.

The connection between the first transmitting unit 401 and the processing module 402 may be as follows: an input interface of the third laser 411 is connected with the first output interface of the processing component 402, and the input interface of the third laser 411 is used for receiving the test electrical signal output by the first output interface of the processing component 402; an input interface of the fourth laser 413 is connected to the second output interface of the processing component 402, and an input interface of the fourth laser 413 is configured to receive the non-test electrical signal output by the second output interface of the processing component 402.

The working principle of the first transmitting unit 401 is as follows: when an input interface of the third laser 411 receives a test electrical signal output by the first output interface of the processing component 402, the third laser 411 performs electro-optical conversion on the received test electrical signal to obtain a test optical signal, and transmits the test electrical signal to the second wavelength division multiplexer 415, because the second wavelength division multiplexer 415 is located on a transmission light path of the third laser 411, the second wavelength division multiplexer 415 can receive the test optical signal transmitted by the third laser 411, and when the second wavelength division multiplexer 415 receives the test optical signal, the test optical signal is transmitted to an optical fiber; when the input interface of the fourth laser 413 receives the non-test electrical signal output by the second output interface of the processing component 402, the fourth laser 413 performs electro-optical conversion on the received non-test electrical signal to obtain a non-test optical signal, and transmits the non-test electrical signal to the second wavelength division multiplexer 415, because the second wavelength division multiplexer 415 is located on the transmission optical path of the fourth laser 413, the second wavelength division multiplexer 415 can receive the non-test optical signal transmitted by the fourth laser 413, and when the second wavelength division multiplexer 415 receives the non-test optical signal, the non-test optical signal is transmitted to the optical fiber.

When the third laser 411 has a forward bias voltage of a fourth preset value, the third laser 411 may convert the test electrical signal into a test optical signal, thereby completing the electro-optical conversion of the test electrical signal. When the fourth laser 413 has a forward bias voltage of a fifth preset value, the fourth laser 413 may convert the non-test electrical signal into a non-test optical signal, thereby completing the electro-optical conversion of the non-test electrical signal. Then, the second bias voltage control circuit may also provide a fourth preset value of forward bias voltage for the third laser 411 so that the third laser 411 may convert the test electrical signal into the test optical signal, and may also provide a fifth preset value of forward bias voltage for the fourth laser 413 so that the fourth laser 413 may convert the non-test electrical signal into the non-test optical signal.

In some embodiments, the two lasers in the optical assembly 401 may also be located on the same optical path, referring to the schematic structural diagram of an optical network terminal provided in the embodiment of the present application shown in fig. 5, the first transmitting unit 41 includes a fifth laser 412 and a sixth laser 414;

the fifth laser 412 is configured to receive the test electrical signal output by the processing component 402, perform electro-optical conversion on the received test electrical signal, obtain a test optical signal, and emit the test optical signal;

a sixth laser 414 is disposed on the emitted light path of the fifth laser 412, the sixth laser 414 being configured to transmit the test light signal;

the sixth laser 414 is further configured to receive the non-test electrical signal output by the processing component 402, perform electro-optical conversion on the received non-test electrical signal to obtain a non-test optical signal, and emit the non-test optical signal.

The connection relationship between the first emitting unit 41 and the optical assembly 402 may be: an input interface of the fifth laser 412 is connected with the first output interface of the processing component 402, and the input interface of the fifth laser 412 is used for receiving the test electrical signal output by the first output interface of the processing component 402; an input interface of the sixth laser 414 is connected to the second output interface of the processing component 402, and the input interface of the sixth laser 414 is configured to receive the non-test electrical signal output by the second output interface of the processing component 402.

At this time, the operating principle of the first transmitting unit 41 is: when the input interface of the fifth laser 412 receives the test electrical signal output by the first output interface of the processing component 402, the fifth laser 412 performs electro-optical conversion on the test electrical signal to obtain a test optical signal, and transmits the test optical signal to the sixth laser 414, because the sixth laser 414 is located on the transmission optical path of the fifth laser 412, the sixth laser 414 can receive the test optical signal transmitted by the fifth laser 412, and when the sixth laser 414 receives the test optical signal, the test optical signal is transmitted to the optical fiber; when the input interface of the sixth laser 414 receives the non-test electrical signal output by the second output interface of the processing assembly 402, the sixth laser 414 performs electro-optical conversion on the non-test electrical signal to obtain a non-test optical signal, and transmits the test optical signal to the optical fiber.

When the fifth laser 412 has a forward bias voltage of a fourth preset value, the fifth laser 412 may convert the test electrical signal into a test optical signal, thereby completing the electro-optical conversion of the test electrical signal. When the sixth laser 414 has a forward bias voltage of a fifth preset value, the sixth laser 414 may convert the non-test electrical signal into a non-test optical signal, thereby completing the electro-optical conversion of the non-test electrical signal. Then the second bias voltage control circuit may also provide a fourth predetermined value of forward bias voltage for the fifth laser 412 so that the fifth laser 412 may convert the test electrical signal to the test optical signal, and may also provide a fifth predetermined value of forward bias voltage for the sixth laser 414 so that the sixth laser 414 may convert the non-test electrical signal to the non-test optical signal.

Since the fifth laser 412 and the sixth laser 414 are on the same optical path and affect each other, when the processing component 402 sends the test electrical signal to the fifth laser 412, the second bias voltage control circuit may provide a fourth preset value of forward bias voltage for the fifth laser 412, and provide a lower value of forward bias voltage or a lower value of forward bias voltage for the sixth laser 414 than the fifth preset value, until the sixth laser 414 transmits the test optical signal emitted by the fifth laser 412 to the optical fiber, and then the second bias voltage control circuit provides the fifth preset value of forward bias voltage for the sixth laser 414, so that the sixth laser 414 may perform electro-optical conversion on the non-test electrical signal when the sixth laser 414 is not under test. When the processing component 402 outputs the non-test optical signal to the sixth laser 414, the second bias voltage control circuit may provide the sixth laser 414 with a positive bias voltage of a fifth predetermined value and provide the fifth laser 412 with a positive bias voltage or a negative bias voltage lower than the fourth predetermined value to reduce the effect of the fifth laser 412 on the sixth laser 414.

In some embodiments, the optical assembly 401 may also implement the electro-optical conversion of the test electrical signal and the non-test electrical signal by only one laser, and in one possible implementation, the first transmitting unit 41 includes a seventh laser 416;

the seventh laser 416 is used for receiving the test electrical signal or the non-test electrical signal output by the processing component 402;

the seventh laser 416 is further configured to perform electro-optical conversion on the received test electrical signal to obtain a test optical signal, and emit the test optical signal;

the seventh laser 416 is further configured to perform electro-optical conversion on the received non-test electrical signal to obtain a non-test optical signal, and emit the non-test optical signal.

The connection relationship between the first emitting unit 41 and the optical assembly 402 may be: a first input interface of the seventh laser 416 is connected to the first output interface of the processing component 402, and the first input interface of the seventh laser 416 is configured to receive the test electrical signal output by the first output interface of the processing component 402; a second input interface of the seventh laser 416 is connected to the second output interface of the processing component 402, and the second input interface of the seventh laser 416 is configured to receive the non-test electrical signal output by the second output interface of the processing component 402.

The seventh laser may be a tunable laser, and in this case, the operation principle of the first emitting unit 41 is as follows: after the first input interface of the seventh laser receives the test electrical signal output by the first output interface of the processing assembly 402, the seventh laser performs electro-optical conversion on the test electrical signal to obtain a test optical signal, and transmits the test optical signal to the optical fiber; when the second input interface of the seventh laser receives the non-test electrical signal output by the second output interface of the processing component 402, the seventh laser performs electro-optical conversion on the non-test electrical signal to obtain a non-test optical signal, and transmits the non-test optical signal to the optical fiber.

When the seventh laser 416 has the first control voltage of the sixth preset value, the seventh laser 416 may convert the test electrical signal into the test optical signal, so as to complete the electrical-to-optical conversion of the test electrical signal. When the seventh laser 416 has the second modulation voltage with the seventh preset value, the seventh laser 416 may convert the non-test electrical signal into the non-test optical signal, so as to complete the electrical-to-optical conversion of the non-test electrical signal. Then, when the seventh laser 416 receives the test electrical signal, the second bias voltage control circuit is further configured to provide the seventh laser 416 with a sixth preset value of the first control voltage, so that the seventh laser 416 can convert the test electrical signal into the test optical signal, and when the seventh laser 416 receives the non-test electrical signal, the second bias voltage control circuit is further configured to provide the seventh laser 416 with a seventh preset value of the second control voltage, so that the seventh laser 416 can convert the non-test electrical signal into the non-test optical signal.

In some embodiments, the optical component 401 may further include an amplifying unit, where an input interface of the amplifying unit is connected to an output interface of the third receiving unit 42, an input interface of the amplifying unit is configured to receive a target electrical signal output by the output interface of the third receiving unit 42, and the amplifying unit is further configured to process the target electrical signal to obtain a third amplified signal, where the amplifying unit processes the target electrical signal, and a process of obtaining the third amplified signal is the same as a process of obtaining the second amplified signal by processing the first electrical signal. The output interface of the amplifying unit is connected to the second input interface of the processing component 102, and the output interface of the amplifying unit is used for outputting the second voltage signal to the second input interface of the processing component 102.

The above is a description of the specific structure of the optical assembly 401, and the following description of the internal structure of the processing assembly 402 is started: the processing component 402 comprises a processor 21 and a sampling unit 22;

the processor 21 is configured to output the test electrical signal and the non-test electrical signal to the first transmitting unit 41, and output a sampling instruction to the sampling unit 22, where the sampling instruction is used to instruct to perform sampling processing on the target electrical signal;

the sampling unit 22 is configured to receive the target electrical signal output by the third receiving unit, perform sampling processing on the target electrical signal according to the sampling instruction, obtain a sampling result, and test the optical fiber based on the sampling result.

It should be noted that the working principle and the action of the processor 21 in the processing component 402 and the processor 21 in the processing component 102 are the same, the working principle and the action of the sampling unit 22 in the processing component 402 and the sampling unit 22 in the processing component 102 are the same, and the working principle and the action of the processing component 402 and the processing component 102 are the same, and both the testing electrical signal, the non-testing electrical signal and the electrical signal output by the optical component are provided for the optical component to test the optical fiber, which is not described in detail for the processing component 402 in the embodiment of the present application.

It should be noted that the processor in the processing component 402 may also include the master processor 211 and the slave processor 212, and the processing component 402 may include units such as the storage unit 23, the LDD24, and the LA 25, wherein the processor in the processing component 402 may include the master processor 211 and the slave processor 212, the storage unit 23, the LDD24, and the LA 25, and the functions and connection manners of the master processor 211 and the slave processor 212, the storage unit 23, the LDD24, and the LA 25 in the processing component 102 are the same, and details of the master processor 211 and the slave processor 212, the storage unit 23, the LDD24, and the LA 25 in the processing component 402 are not described herein.

The processing component 402 differs from the processing component 102 in that: the input interface of the sampling unit 22 in the processing component 402 is connected to the output interface of the third receiving unit 42, and is configured to receive the target optical signal output by the output interface of the third receiving unit 42; a first output interface of the processor 21 is connected to a first interface of the first transmitting unit 41, and is configured to input the test electrical signal to a first input interface of the first transmitting unit 41; a second output interface of the processor 21 is connected to a second interface of the first transmitting unit 41, and is configured to input a non-test electrical signal to a second input interface of the first transmitting unit 41; when the processor in the processing component 402 includes the master processor 211 and the slave processor 212, the second output interface of the master processor 211 is connected to the second input interface of the first transmitting unit 41, and is used to output the non-test electrical signal to the second input interface of the first transmitting unit 41, and the first output interface of the slave processor 212 is connected to the first input interface of the first transmitting unit 41, and is used to output the test electrical signal to the first input interface of the first transmitting unit 41; when the processing component 402 comprises an LDD24, the LDD24 comprises a first LDD241 and a second LDD242, wherein an output interface of the first LDD241 is connected to a first output interface of the processor 212 for receiving a test electrical signal output from the first output interface of the processor 212, and an output interface of the first LDD241 is connected to a first input interface of the first transmitting unit 41 for connecting an output test electrical signal to a first input interface of the first transmitting unit 41 and for exciting the first transmitting unit 41 to convert the test electrical signal into a test optical signal; the output interface of the second LDD241 is connected to the second output interface of the main processor 211, and is configured to receive the non-test electrical signal output by the second output interface of the main processor 211, and the output interface of the second LDD242 is connected to the second input interface of the first transmitting unit 41, and is configured to output the non-test electrical signal to the second input interface of the first transmitting unit 41, and activate the first transmitting unit 41 to convert the non-test electrical signal into the test optical signal.

The optical network terminal provided by the embodiment of the application only comprises the processing component and the optical component, and the optical component only comprises the first transmitting unit and the third receiving unit, and does not need to comprise a plurality of units only having receiving or transmitting functions, that is, the optical component provided by the embodiment of the application has fewer components, so that the manufacturing process is relatively simple, and the manufacturing cost of the optical component can be reduced.

Fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application, where the terminal 600 includes a relatively large difference due to different configurations or performances, and may include one or more processors 602 (CPUs) 601 and one or more memories 602, where at least one instruction is stored in the memory 602, and the at least one instruction is loaded and executed by the processor 601 to implement the fiber testing method in the following embodiments. Certainly, the terminal 600 may further have components such as a wired or wireless network interface, a keyboard, and an input/output interface, so as to perform input and output, and the terminal 600 may further include other components for implementing the functions of the device, which is not described herein again.

In an exemplary embodiment, a computer readable storage medium, such as a memory, is also provided that includes instructions executable by the processor 602 in the terminal to perform the functions of the processor 602 in the above embodiments. For example, the computer-readable storage medium may be a read-only memory (ROM), a Random Access Memory (RAM), a compact disc-read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, and the like.

In order to further embody the specific process of the optical network terminal testing the optical fiber, refer to a flowchart of an optical fiber testing method provided in the embodiment of the present application shown in fig. 7, where the flow of the method specifically includes the following steps 701-706.

701. The optical network terminal receives a test instruction, wherein the test instruction is used for indicating that the optical fiber of the optical network terminal is tested, and the optical network terminal comprises an optical component.

This step 701 may be performed by a processing component within the optical network terminal. For further explaining a transmission process of a signal in the PON system, referring to a schematic diagram of the PON system provided in the embodiment of the present application shown in fig. 8, the PON system is composed of three parts: an Optical Line Termination (OLT), an Optical Distribution Network (ODN), and an optical network termination (onu), wherein the ODN is generally divided into four parts, a passive optical splitter (splitter), a trunk fiber (feed fiber)1, a distribution fiber (distribution fiber)2, and a drop fiber (drop fiber)3, wherein the distribution fiber 2 and the drop fiber 3 can be collectively referred to as a branch fiber, and the OLT can output a downlink signal to the optical network termination connected to the branch fiber through an optical fiber in the OND, and the optical network termination can also output an uplink signal to the OLT connected to the branch fiber through an optical fiber in the OND.

The OLT may send a fifth optical signal for indicating a test instruction to a trunk fiber connected to the OLT in the OND, the fifth optical signal is transmitted in the trunk fiber and transmitted to the primary passive optical splitter, the primary passive optical splitter outputs the fifth optical signal to any distribution fiber connected to the primary passive optical splitter, the fifth optical signal is transmitted in the distribution fiber and transmitted to the secondary passive optical splitter, the secondary passive optical splitter outputs the third optical signal to any splitting fiber connected to the secondary passive optical splitter, the splitting fiber outputs the fifth optical signal to an optical network terminal connected to the splitting fiber, a second receiving unit in the optical network terminal performs an optical-electrical conversion on the fifth optical signal to obtain an eighth electrical signal, the eighth electrical signal is used for indicating the test instruction, the second receiving unit outputs the eighth electrical signal to the processing component 102 of the optical network terminal, the processing component 102 of the onu may receive the eighth electrical signal, i.e. the test instruction.

The OLT may be triggered by an operation of a technician, and when the technician configures test information such as the length, the test time, and the test mode of the tested optical fiber on the configuration interface of the OLT, the OLT may be triggered to output a fifth optical signal for indicating a test instruction to the trunk optical fiber.

It should be noted that, in addition to outputting the fifth optical signal to the second receiving unit, the optical fiber may also transmit an optical signal with a second wavelength to the second receiving unit; the second receiving unit receives the optical signal, performs photoelectric conversion on the optical signal to obtain a sixth electrical signal, and outputs the sixth electrical signal to the processing assembly.

702. The optical network terminal tests and sets the optical assembly so that the optical assembly performs electro-optical conversion on a test electrical signal for testing to obtain a first target test optical signal with a target wavelength, and performs photoelectric conversion on a second target test optical signal with the target wavelength returned by the optical fiber.

This step 702 may be performed by a processing component within the optical network terminal. The target wavelength may be the first wavelength or the third wavelength, and accordingly, the first target test optical signal may be the second optical signal or the target optical signal, and the target wavelength is not specifically limited in this embodiment of the application.

The test setup performed in this step 702 may be: units in the optical assembly which do not participate in processing the test electrical signals and the test optical signals are arranged so as to reduce crosstalk of the units on the test electrical signals and the test optical signals. The preset test settings are different for different optical assemblies, and when the optical assembly comprises the first transceiver unit, the test settings may comprise any one of the following items 1 to 3:

item 1: when the first transceiver unit includes the first laser and the first detector, the first bias voltage control circuit provides the first detector 113 with a negative bias voltage or a positive bias voltage smaller than a second preset value before the processing component 102 outputs the test electrical signal to the first transceiver unit, after a first preset time period, the first bias voltage control circuit provides the first detector with the negative bias voltage of the second preset value, and the first bias voltage control circuit continuously provides the first laser with the positive bias voltage of the first preset value.

And item 2, before the processing assembly outputs the test electrical signal to the first transceiver unit, the processing assembly controls the first bias voltage control circuit to reduce the voltage of the TIA or not to supply power to the TIA, and after a first preset time period, the original voltage of the TIA is recovered.

By the arrangement of item 2, before the TIA receives the second electrical signal, the TIA is in an unsaturated state, so that the TIA cannot normally work, and the influence of the TIA on the test optical signal can be reduced.

Item 3, before the processing component outputs the test electrical signal to the first transceiver unit, the processing component controls the first bias voltage control circuit to reduce the gain effect of the TIA, and after a first preset time period, the original gain effect of the TIA is recovered.

Because TIA can amplify the received signal of telecommunication through the gain effect of oneself, in order to prevent TIA normal operation to the influence of testing the optical signal, before testing the optical signal and transmitting to the optic fibre, the processing assembly can reduce TIA's gain effect through the first bias voltage control circuit of processing assembly control, in order to reduce the influence to testing the optical signal, after testing optical signal output to optic fibre, resume TIA original gain effect again, make follow-up TIA can work according to original gain effect.

Specifically, the processing component may output a ninth electrical signal for indicating the gain control signal to the first bias voltage control circuit, and the gain control signal carries a low-gain operating mode of the TIA, so that the first bias voltage control circuit controls the TIA to operate in the low-gain operating mode, and after a first preset time period, the first bias voltage control circuit controls the TIA to operate in a high-gain operating mode (an original gain operating mode), where the original gain operating mode may enable a gain effect of the TIA to reach an original gain effect.

When the processing component includes the first transmission unit, the processing component may perform the setting as described in item 2 or 3 above on the TIA through the second bias voltage circuit.

It should be noted that, when the processing component receives the test instruction, the main processor 211 needs to send the test instruction to the slave processor in addition to performing the test setting, and after receiving the test instruction, the slave processor sends a sampling instruction to the sampling unit, where the sampling instruction carries the length of the optical fiber to be tested and the sampling time, so that after receiving the second electrical signal, the sampling unit can sample the second electrical signal according to the length of the optical fiber carried in the sampling instruction and the sampling time, and test the optical fiber based on the sampling result.

703. And after the test setting is finished, the optical network terminal outputs a test electric signal to the optical component.

This step 703 may be performed by a processing component within the optical network terminal. The specific process of the processing element outputting the test electrical signal to the optical element is described in the foregoing, and this step 703 is not described in detail in this embodiment of the present application.

704. The optical component performs electro-optical conversion on the test electrical signal to obtain a first target test optical signal with a target wavelength, and outputs the first target test optical signal to an optical fiber connected with the optical network terminal, wherein the test electrical signal is used for indicating to test the optical fiber.

When the target wavelength is a first wavelength, the first target test optical signal is a first optical signal, and when the target wavelength is a third wavelength, the first target test optical signal is a test optical signal. The process of performing the electro-optical conversion on the test electrical signal by the optical component is introduced in the foregoing, and this step 704 is not described in this embodiment of the present application.

705. And the optical network terminal receives a target test electrical signal output by the optical component, and the target test electrical signal is obtained by performing photoelectric conversion on a second target test optical signal with a target wavelength returned by the optical fiber by the optical component.

This step 705 may be performed by a processing component within the optical network terminal. When the target wavelength is the first wavelength, the target test electrical signal is the second electrical signal, and when the target wavelength is the third wavelength, the target test electrical signal is the test electrical signal. The process of performing photoelectric conversion on the signal returned by the optical fiber by the optical component is described in the foregoing, and this step 705 is not described in detail in this embodiment of the present application.

706. And the optical network terminal tests the optical fiber based on the target test electric signal.

This step 706 may be performed by a processing component within the optical network terminal. The process of the processing component testing the optical fiber based on the second electrical signal and the process of testing the end of the optical fiber based on the test electrical signal are described in the foregoing, and this step 706 is not described in detail in this embodiment of the present application.

The method provided by the embodiment of the application can directly use the optical component and the processing component in the optical network terminal to complete the test process of the optical fiber, and does not need to use equipment except the PON to test the optical fiber in the PON, thereby simplifying the detection process and reducing the detection cost. In addition, by performing the test setting before the start of the test, the influence on the first test target optical signal can be reduced, and the accuracy of the test result can be improved.

For further illustration of the different processes of performing photoelectric conversion or photoelectric conversion on different optical assemblies, refer to a flowchart of a method for testing an optical fiber provided in the embodiment of the present application shown in fig. 9, where the flowchart specifically includes the following

steps

901 and 906.

901. The optical network terminal comprises an optical component and a processing component, wherein the optical component comprises a first transceiver unit.

The process shown in step 901 is the same as the process shown in step 701, and here, the embodiment of the present application does not repeat this step 901.

902. The processing assembly outputs a test electrical signal to the first transceiving unit, and the test electrical signal is used for testing the optical fiber connected with the network terminal.

Specifically, after the slave processor in the processing assembly receives the test instruction, the test electrical signal is output to the first transceiver unit 11, and there is a specific process of outputting the test electrical signal from the slave processor to the first transceiver unit in the foregoing, which is not described in detail in this embodiment of the present application for this step 902.

It should be noted that before executing the step 902, the processing component may perform test setup, and the specific process of the test setup is referred to as step 702.

903. The first transceiver unit receives the test electrical signal, performs electro-optical conversion on the test electrical signal to obtain a test optical signal with a first wavelength, and outputs the test optical signal to the optical fiber.

The process shown in step 903 is described in the foregoing, and this step 903 is not described in detail in this embodiment of the present application.

904. When the test optical signal is transmitted in the optical fiber, the optical fiber returns a second optical signal with the first wavelength to the first transceiver unit.

The process shown in step 904 is described in the foregoing, and this step 904 is not described in detail in this embodiment of the present application.

905. The first receiving and transmitting unit receives the second optical signal, performs photoelectric conversion on the second optical signal to obtain a second electric signal, and outputs the second electric signal to the processing assembly.

The process shown in step 905 is described in the foregoing, and this step 905 is not described in detail in this embodiment of the present application.

906. The processing component tests the optical fiber based on the second electrical signal.

This step 906 may be performed by a sampling unit in the processing assembly, and the process of testing the optical fiber by the sampling unit based on the second electrical signal is described in the foregoing, which is not described in this embodiment of the present application for this step 906 again.

When the optical module includes the second receiving unit, the optical fiber transmits an optical signal of the second wavelength to the second receiving unit; the second receiving unit receives the optical signal, performs photoelectric conversion on the optical signal to obtain a sixth electrical signal, and outputs the sixth electrical signal to the processing assembly. The process of the sixth electrical signal is described above and will not be described herein.

The method provided by the embodiment of the application can directly use the first transceiver unit and the processing component in the optical network terminal to complete the test process of the optical fiber, and does not need to use equipment except the PON to test the optical fiber in the PON, thereby simplifying the detection process and reducing the detection cost. In addition, by performing test setting before starting the test, the influence on the test optical signal can be reduced, and the precision of the test result can be improved. And the first detector is also used for detecting the first optical signal and outputting a fourth electrical signal, the processing component detects whether the first laser fails or not according to the sixth electrical signal, the second receiving unit is also used for detecting the optical signal with the second wavelength transmitted by the optical fiber and outputting the sixth electrical signal, and the processing component detects whether the optical fiber fails or not according to the sixth electrical signal, so that whether the first laser and the optical fiber fail or not can be directly monitored by the processing component of the optical network terminal, artificial monitoring is not needed, and the maintenance cost of the optical network terminal is reduced.

For further explaining a specific process of testing an optical fiber by an optical network terminal including a first transmitting unit, reference is made to a flowchart of an optical fiber testing method provided by the embodiment of the present applicant shown in fig. 10, where the flowchart of the method specifically includes the following

steps

1001 and 1006.

1001. The optical network terminal comprises an optical component and a processing component, wherein the optical component comprises a first transmitting unit and a third receiving unit.

The process shown in step 1001 is the same as the process shown in step 901, and this embodiment of the present application does not repeat this step 1001.

1002. The processing assembly outputs a test electrical signal to the first transmitting unit, and the test electrical signal is used for testing an optical fiber connected with the network terminal.

The process in step 1002 is described in the foregoing, and here, the step 1002 is not described in detail in this embodiment of the present application.

It should be noted that, before the processing component executes this step, the processing component may also perform test setting, specifically, before the processing component outputs the test electrical signal to the first transceiver unit, the processing component controls the second bias voltage control circuit to reduce the voltage of the TIA or does not supply power to the TIA, and after a first preset time period, the original voltage of the TIA is recovered; or before the processing component outputs the test electrical signal to the first transceiver unit, the processing component controls the second bias voltage control circuit to reduce the gain effect of the TIA, and after a first preset time period, the original gain effect of the TIA is recovered.

1003. The first transmitting unit receives the test electrical signal, performs electro-optical conversion on the test electrical signal to obtain a test optical signal with a third wavelength, and outputs the test optical signal to the optical fiber.

The process shown in step 1003 is described in the foregoing, and here, this step 1003 is not described in detail in this embodiment of the present application.

1004. When the test optical signal is transmitted in the optical fiber, the optical fiber returns the target optical signal of the third wavelength to the third receiving unit.

The process shown in step 1004 is described in the foregoing, and this step 1004 is not described in detail in this embodiment of the present application.

1005. The third receiving unit receives the target optical signal, performs photoelectric conversion on the target optical signal to obtain a target electrical signal, and outputs the target electrical signal to the processing assembly.

The process shown in step 1005 is described in the foregoing, and this step 1005 is not described in detail in this embodiment of the present application.

It should be noted that, after receiving the target optical signal, the third receiving unit may further detect the target optical signal returned through the optical fiber, output a fifth electrical signal, and the processing component detects whether the optical fiber has a fault according to the fifth electrical signal.

1006. The processing assembly tests the optical fiber based on the target electrical signal.

This step 1006 can be executed by a sampling unit in the processing assembly, and the process of testing the optical fiber based on the target electrical signal by the sampling unit is the same as the process of testing the optical fiber based on the second electrical signal, and here, this step 1006 is not described in detail in this embodiment of the present application.

The method provided by the embodiment of the application can directly use the first transmitting unit, the third receiving unit and the processing assembly in the optical network terminal to complete the test process of the optical fiber, and does not need to use equipment except the PON to test the optical fiber in the PON, thereby simplifying the detection process and reducing the detection cost. In addition, by performing test setting before starting the test, the influence on the test optical signal can be reduced, and the accuracy of the test result can be improved. And after the third receiving unit receives the target optical signal, the third receiving unit can also detect the target optical signal returned by the optical fiber and output a sixth electrical signal, and the processing assembly detects whether the optical fiber has a fault according to the sixth electrical signal without manual monitoring, so that the maintenance cost is reduced.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An optical network terminal, comprising an optical component and a processing component, wherein the processing component is configured to output a first electrical signal to the optical component, and the first electrical signal comprises a test electrical signal for testing or a non-test electrical signal for carrying service data;

the optical assembly comprises a first transceiver unit, the first transceiver unit is connected with the processing assembly, and the first transceiver unit comprises a first laser and a first detector;

the first laser is used for receiving the first electric signal output by the processing assembly, performing electro-optical conversion on the received first electric signal to obtain a first optical signal with a first wavelength, and transmitting the first optical signal;

the first detector is further configured to receive a second optical signal with the first wavelength returned through an optical fiber, perform photoelectric conversion on the second optical signal to obtain a second electrical signal, and output the second electrical signal to the processing component.

2. The ont of claim 1, wherein the first detector is further configured to detect the first optical signal and output a third electrical signal, and the processing module detects whether the first laser fails according to the third electrical signal.

3. The optical network terminal of claim 1, wherein the first transceiver unit comprises a second laser, a coupler, and a second detector;

the second laser is used for receiving the first electric signal output by the processing assembly, performing electro-optical conversion on the received first electric signal to obtain a first optical signal, and transmitting the first optical signal;

4. The optical network terminal according to claim 1, wherein the optical component further includes a second receiving unit, the second receiving unit is configured to detect an optical signal with a second wavelength transmitted through the optical fiber and output a fourth electrical signal, and the processing component detects whether the optical fiber is faulty according to the fourth electrical signal.

5. The optical network terminal of claim 1, wherein the optical assembly further comprises a first wavelength division multiplexer;

6. The optical network terminal of claim 1, wherein the processing component comprises a processor and a sampling unit;

7. An optical network terminal, characterized in that the optical network terminal comprises an optical component and a processing component, wherein the processing component is configured to output a test electrical signal for testing or a non-test electrical signal for carrying service data to the optical component;

the optical assembly comprises a first transmitting unit and a third receiving unit, the first transmitting unit and the third receiving unit are both connected with the processing assembly, and the first transmitting unit comprises a fifth laser and a sixth laser;

the fifth laser is used for receiving the test electrical signal output by the processing assembly, performing electro-optical conversion on the received test electrical signal to obtain a test optical signal with a third wavelength, and transmitting the test optical signal;

the sixth laser is further configured to receive the non-test electrical signal output by the processing component, perform electro-optical conversion on the received non-test electrical signal to obtain a non-test optical signal with a first wavelength, and emit the non-test optical signal;

the third receiving unit is configured to receive the target optical signal of the third wavelength returned through the optical fiber, perform photoelectric conversion on the target optical signal, obtain a target electrical signal, and output the target electrical signal to the processing assembly.

8. The optical network terminal of claim 7, wherein the first transmitting unit comprises a third laser, a fourth laser, and a second wavelength division multiplexer;

the second wavelength division multiplexer is disposed on an emission light path of the third laser and an emission light path of the fourth laser, the second wavelength division multiplexer is configured to transmit the test optical signal and the non-test optical signal and reflect the target optical signal, and the third receiving unit is disposed on a reflection light path of the second wavelength division multiplexer.

9. The optical network terminal of claim 7, wherein the first transmitting unit comprises a seventh laser;

10. The optical network terminal of claim 7, wherein the third receiving unit comprises a filter and a third detector;

11. The optical network terminal according to claim 7, wherein the optical component further includes an optical splitter, the optical splitter is disposed on a transmission optical path of the optical fiber, and the optical splitter is configured to receive an optical signal, split the optical signal according to a preset splitting ratio to obtain a first split signal corresponding to the first transmitting unit and a second split signal corresponding to the third receiving unit, output the first split signal to the first transmitting unit, and output the second split signal to the third receiving unit.

12. The optical network terminal according to claim 7, wherein the third receiving unit is further configured to receive a target optical signal at a third wavelength and output a fifth electrical signal, and the processing component detects whether the optical fiber is faulty according to the fifth electrical signal.

13. The ont of claim 7, wherein the processing component comprises a processor and a sampling unit;

the sampling unit is used for receiving the target electric signal output by the third receiving unit, sampling the target electric signal according to the sampling instruction to obtain a sampling result, and testing the optical fiber based on the sampling result.

14. An optical fiber testing method applied to an optical network terminal comprising an optical component, wherein the optical component comprises a first laser and a first detector, and the first detector is arranged on an emission light path of the first laser, and the method comprises the following steps:

outputting a test electrical signal to the optical component, performing electro-optical conversion on the test electrical signal by using the first laser to obtain a first target test optical signal with a target wavelength, transmitting the first target test optical signal, and transmitting the first target test optical signal by using the first detector, wherein when the target wavelength is the first wavelength, the first target test optical signal is the first optical signal, and the test electrical signal is used for indicating to test the optical fiber;

receiving a target test electrical signal output by the optical component, wherein the target test electrical signal is obtained by performing photoelectric conversion on a second target test optical signal with the target wavelength returned by the optical fiber by the first laser, and when the target wavelength is a first wavelength, the target test optical signal is a second optical signal;

testing the optical fiber based on the target test electrical signal.

15. The method of claim 14, wherein prior to outputting the test electrical signal light to the optical assembly, the method further comprises:

16. An optical network terminal, characterized in that the optical network terminal comprises a processor and a memory, wherein the memory stores at least one instruction, and the instruction is loaded and executed by the processor to implement the operation performed by the optical fiber testing method according to claim 14.