CN118337289B - 800G LPO silicon optical module with self-adaptive control - Google Patents
800G LPO silicon optical module with self-adaptive control Download PDFInfo
- Publication number
- CN118337289B CN118337289B CN202410759684.7A CN202410759684A CN118337289B CN 118337289 B CN118337289 B CN 118337289B CN 202410759684 A CN202410759684 A CN 202410759684A CN 118337289 B CN118337289 B CN 118337289B
- Authority
- CN
- China
- Prior art keywords
- signal
- optical
- optical signal
- adaptive control
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 293
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 33
- 239000010703 silicon Substances 0.000 title claims abstract description 33
- 238000012937 correction Methods 0.000 claims abstract description 93
- 230000005540 biological transmission Effects 0.000 claims abstract description 54
- 230000003321 amplification Effects 0.000 claims abstract description 41
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 41
- 230000021615 conjugation Effects 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 230000003044 adaptive effect Effects 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 44
- 238000001228 spectrum Methods 0.000 claims description 42
- 230000008569 process Effects 0.000 claims description 27
- 230000004044 response Effects 0.000 claims description 26
- 230000008859 change Effects 0.000 claims description 21
- 238000005516 engineering process Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 230000003595 spectral effect Effects 0.000 claims description 10
- 230000035945 sensitivity Effects 0.000 claims description 9
- 230000008054 signal transmission Effects 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 7
- 238000001069 Raman spectroscopy Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 abstract description 25
- 238000005457 optimization Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 14
- 230000004075 alteration Effects 0.000 description 11
- 238000004364 calculation method Methods 0.000 description 8
- 239000000306 component Substances 0.000 description 6
- 230000010354 integration Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000014509 gene expression Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010219 correlation analysis Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Landscapes
- Optical Communication System (AREA)
Abstract
The invention relates to the technical field of optical modules, in particular to an 800G LPO silicon optical module with self-adaptive control. It comprises the following steps: the optical transmitter, the phase conjugate filter, the photoelectric detector and the self-adaptive control part; the light emitter is used for emitting light signals; the phase conjugate filter is used for performing optical filtering processing based on optical phase conjugation on the received optical signal; the photoelectric detector is used for converting the optical signal into an electric signal based on the filtered optical signal and combining parameters of the optical signal; the self-adaptive control part is used for carrying out wave front correction on the electric signal so as to compensate wave front distortion of the optical signal in the transmission process, carrying out error rate detection on the amplified second intermediate signal, and carrying out dynamic adjustment on the transmitting power of the optical transmitter and the amplification factor of the amplifier. The invention realizes the accurate adjustment and optimization of the optical signal, optimizes the transmission quality and stability of the optical signal, and improves the reliability and performance of the communication system.
Description
Technical Field
The invention belongs to the technical field of optical modules, and particularly relates to an 800G LPO silicon optical module with self-adaptive control.
Background
With the rapid development of digital communication technology, data transmission requirements are continuously increasing, and higher requirements are placed on the bandwidth and speed of a communication system. In the field of optical communications, as demand increases, 800G LPO (Low-ProfileOptics) silicon optical modules are receiving more and more attention as an emerging high-speed data transmission technology. However, conventional optical communication technologies still face a series of challenges in facing data transmission at the 800Gbps level, and thus more efficient and reliable technologies are needed to address these challenges.
In a conventional optical communication system, a high-speed optical signal is easily affected by wavefront distortion and signal attenuation during transmission, resulting in degradation of signal quality received by a receiving end, thereby affecting reliability and stability of communication. These problems are particularly acute for high-speed data transmission at the 800Gbps level. Conventional optical communication techniques often have difficulty meeting this level of data transmission requirements because they are often limited by optics and do not allow for precise adjustment and optimization of high-speed optical signals.
To solve these problems, some research institutions and enterprises have recently begun to develop new 800G LPO silicon optical module technologies to meet the requirements of high-speed data transmission. The novel technology has many advantages, such as high integration level, low cost, small volume and the like, and can realize accurate control and adjustment of high-speed optical signals, thereby improving the performance and stability of a communication system.
However, despite the great potential of 800G LPO silicon optical module technology, there are still some challenges and limitations in practical applications. First, the conventional 800G LPO silicon optical module is often affected by loss and wavefront distortion in the optical signal transmission path, resulting in serious signal attenuation, which affects the transmission distance and performance of the communication system. Secondly, the existing 800G LPO silicon optical module technology is limited when dynamically adjusting optical signals, so that accurate adjustment and optimization of the optical signals cannot be realized, and the performance and stability of a system are affected.
Therefore, in order to overcome the problems and limitations existing in the prior art, a novel 800G LPO silicon optical module technology needs to be provided, which can effectively compensate and adjust the optical signal, and improve the stability and performance of the system, so as to meet the increasing data transmission requirement of 800Gbps level. The novel technology has the self-adaptive control function, can realize real-time adjustment and optimization of the characteristics of the wavefront, the frequency spectrum and the like of the optical signal, and has the characteristics of high efficiency, low cost, low complexity and the like so as to adapt to different communication environments and application scenes.
Disclosure of Invention
The invention mainly aims to provide an 800G LPO silicon optical module with self-adaptive control, which realizes the accurate adjustment and optimization of optical signals, optimizes the transmission quality and stability of the optical signals, improves the reliability and performance of a communication system, reduces the cost and complexity of the system, and has wide application prospect and market potential.
In order to solve the problems, the technical scheme of the invention is realized as follows: an 800G LPO silicon optical module with adaptive control, comprising: the optical transmitter, the phase conjugate filter, the photoelectric detector and the self-adaptive control part; the light emitter is used for emitting light signals; the phase conjugate filter is configured to perform optical filtering processing based on optical phase conjugation on a received optical signal, and specifically includes: processing the optical signal by using a phase reconstruction algorithm, reconstructing phase information of the optical signal, generating an optical signal with the phase completely opposite to that of the optical signal, namely, a phase conjugate signal by using an optical phase conjugation technology, superposing the optical signal and the phase conjugate signal to cause interference, separating the optical signal after interference, removing the part offset by the interference, and completing filtering; the photoelectric detector is used for converting the optical signal into an electric signal based on the filtered optical signal by using a preset photoelectric conversion model and combining parameters of the optical signal; the self-adaptive control part is used for carrying out wave-front correction on the electric signal so as to compensate wave-front distortion of the optical signal in the transmission process and obtain a first intermediate signal; performing self-adaptive optical path compensation on the first intermediate signal to eliminate loss in an optical signal transmission path and obtain a second intermediate signal; and amplifying the second intermediate signal by using an amplifier, detecting the error rate of the amplified second intermediate signal, and dynamically adjusting the transmitting power of the optical transmitter and the amplification factor of the amplifier according to the error rate detection result.
Further, the phase conjugate filter includes: a phase reconstruction unit and a phase conjugate mirror; the phase conjugate mirror is a stimulated Raman scattering mirror or a nonlinear crystal.
Further, the photoelectric conversion model is expressed using the following formula:
；
Wherein, Is an electrical signal; is the optical signal power; quantum efficiency of the photodetector; Is the receiving area; is the receiving rate of the optical signal; the time constant of the photoelectric detector is the time required by the photoelectric detector from the process of receiving the optical signal to generating the corresponding electric signal; Representing the duration of each bit for a symbol period; Is that Is the data rate of the optical signal in the 800G LPO silicon optical module; Is time.
Further, the adaptive control section calculates the corrected wavefront using the following formula:
；
Wherein, A corrected wavefront; is the original wavefront, i.e., the wavefront of the optical signal; coefficients for each correction pattern; Represent the first A correction pattern; Wavenumbers for each correction mode; a phase for each correction mode; Is the first The first correction modeCoefficients of the secondary correction modes; Is the first The first correction modeWavenumbers of the secondary correction modes; Is the first The first correction modeThe phases of the secondary correction modes; is the total number of correction modes; Is the total number of secondary correction modes; the correction mode includes: zernike polynomials, legendre polynomials, sine functions and cosine functions; the secondary correction mode includes: zernike polynomials, legendre polynomials, sine functions and cosine functions.
Further, the adaptive control section calculates the electric signal after the wavefront correction using the following formula:
；
Wherein, For the wavefront corrected electrical signal, i.e. the first intermediate signal; Is an imaginary symbol; Is an integral time variable.
Further, the adaptive control section calculates a frequency spectrum of the first intermediate signal for adaptive optical path compensation using the following formula:
；
Wherein, The spectrum after the self-adaptive optical path compensation is carried out; is the original spectrum, i.e., the spectrum of the optical signal; is the frequency domain response of the phase conjugate mirror; to compensate for the center frequency; to compensate for the frequency range; the order of the phase conjugate mirror; recalculating the spectrum after self-adaptive optical path compensation Is of the spectral amplitude of (2)Will spectrum amplitudeBy multiplying the first intermediate signal by the second intermediate signal,A second intermediate signal is obtained.
Further, the amplification factor when the amplifier amplifies the second intermediate signal is calculated by the following formula:
；
Wherein, The initial magnification is set value; Is an amplification parameter; Is the magnitude of the current error signal; The amplitude of the reference error signal.
Further, the adaptive control section performs bit error rate detection on the amplified second intermediate signal by the following formula:
；
Wherein, Bit error rate is used as the error rate detection result; Energy per bit; Is the single sideband noise power spectral density; As a function of the residual error.
Further, the adaptive control section calculates a power adjustment amount for adjusting the transmission power of the optical transmitter by the following formula based on the result of the error rate detection：
；
Wherein,The partial derivative of the bit error rate to the transmitting power is used for representing the sensitivity degree of the bit error rate to the transmitting power; Is the boltzmann constant, representing the intensity of thermal noise; Is the temperature Representing the derivative of the optical signal spectrum with respect to frequency, representing the rate of change of the optical signal spectrum; recalculating the power adjustmentAnd the sum of the transmission power, the dynamic adjustment of the transmission power of the light emitter is completed.
Further, the adaptive control section calculates an amplification adjustment amount of the amplifier according to the error rate detection result by the following formula：
；
Wherein,The partial derivative of the error rate to the gain represents the sensitivity degree of the error rate to the gain; : the derivative of the frequency domain response of the phase conjugation mirror to frequency represents the rate of change of the frequency domain response of the phase conjugation mirror; re-calculating the amplification adjustment amount And magnification ofAnd (3) dynamically adjusting the amplification factor of the amplifier.
The 800G LPO silicon optical module with the self-adaptive control has the following beneficial effects: the 800G LPO silicon optical module has self-adaptive control, and realizes accurate adjustment and optimization of optical signals by utilizing components such as a phase conjugate filter, a photoelectric detector and the like. The technical content of the invention is mainly embodied in the design of the phase conjugate filter and the algorithm implementation of the self-adaptive control part. The invention can effectively carry out filtering processing based on optical phase conjugation on the received optical signals through the phase conjugation filter, thereby eliminating wave front distortion in the optical signal transmission process and improving the transmission quality and stability of the optical signals. Meanwhile, the self-adaptive control part further optimizes the transmission performance of the optical signal and improves the reliability and stability of the communication system by carrying out wavefront correction and optical path compensation on the electric signal. First, by designing the phase conjugate filter, the invention can effectively correct the wave front distortion of the received optical signal. The phase conjugate filter reconstructs phase information of the optical signal by using a phase reconstruction algorithm, generates a phase conjugate signal which is completely opposite to the phase of the optical signal, and performs interference by using an optical phase conjugate technology to finally realize the filtering processing of the optical signal. Compared with the traditional optical filtering method, the phase conjugate filter can more accurately adjust the phase of the optical signal, thereby improving the transmission quality and stability of the optical signal. Secondly, the adaptive control part of the invention realizes real-time adjustment and optimization of the optical signal by using advanced algorithm. The self-adaptive control part can dynamically adjust the wave front and the light path of the optical signal according to the actual transmission condition and the environmental change of the optical signal so as to adapt to different transmission conditions and requirements. By performing wavefront correction and optical path compensation on the electric signal, the invention can effectively eliminate wavefront distortion and attenuation in the transmission process of the optical signal, and improves the transmission performance and reliability of the optical signal.
Drawings
Fig. 1 is a schematic structural diagram of an 800G LPO silicon optical module with adaptive control according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The following will describe in detail.
Example 1: referring to fig. 1, an 800G LPO silicon optical module with adaptive control, comprising: the optical transmitter, the phase conjugate filter, the photoelectric detector and the self-adaptive control part; the light emitter is used for emitting light signals; the phase conjugate filter is configured to perform optical filtering processing based on optical phase conjugation on a received optical signal, and specifically includes: processing the optical signal by using a phase reconstruction algorithm, reconstructing phase information of the optical signal, generating an optical signal with the phase completely opposite to that of the optical signal, namely, a phase conjugate signal by using an optical phase conjugation technology, superposing the optical signal and the phase conjugate signal to cause interference, separating the optical signal after interference, removing the part offset by the interference, and completing filtering; the photoelectric detector is used for converting the optical signal into an electric signal based on the filtered optical signal by using a preset photoelectric conversion model and combining parameters of the optical signal; the self-adaptive control part is used for carrying out wave-front correction on the electric signal so as to compensate wave-front distortion of the optical signal in the transmission process and obtain a first intermediate signal; performing self-adaptive optical path compensation on the first intermediate signal to eliminate loss in an optical signal transmission path and obtain a second intermediate signal; and amplifying the second intermediate signal by using an amplifier, detecting the error rate of the amplified second intermediate signal, and dynamically adjusting the transmitting power of the optical transmitter and the amplification factor of the amplifier according to the error rate detection result.
In particular, the optical transmitter has high-speed transmission capability, can support data transmission rate of up to 800Gbps, and is suitable for internal connection and long-distance optical communication of a high-speed data center. The low-power design is adopted to reduce the energy consumption of the whole optical module, accords with the trend of energy conservation and environmental protection, and is also beneficial to reducing the heat dissipation requirement. The low-power design is adopted to reduce the energy consumption of the whole optical module, accords with the trend of energy conservation and environmental protection, and is also beneficial to reducing the heat dissipation requirement. In high-speed data transmission at 800Gbps, an optical signal needs to be modulated to carry data information. The optical transmitter is typically equipped with a modulator that modulates the optical signal output by the optical source in response to an input electrical signal. The modulator may employ different modulation schemes, such as direct modulation, external modulation, etc.
The phase conjugate filter first performs a phase measurement on the received optical signal by an optical sensor or other suitable means. This may be achieved by interferometric techniques or by self-phase modulation. For example, the phase difference of the optical signal may be measured using an interference pattern of two light beams, or the optical signal may be interfered using an optical element, and then the intensity change of the interfered signal is measured by a detector, thereby determining the phase information of the optical signal. Next, the phase structure of the optical signal is reconstructed by using the phase reconstruction algorithm using the measured phase information. The process can utilize digital signal processing technology to process and analyze the measured phase data, thereby obtaining the phase information of the optical signal. Common phase reconstruction algorithms include fourier transforms, holography, phase-shifting interferometry, etc. Once the phase information of the optical signal is obtained, the phase may need to be adjusted to be opposite to the phase conjugate signal. This adjustment process may be achieved by adjusting an optical element or an electronic phase modulator. Through proper phase adjustment, the generated phase conjugate signal and the original signal can interfere after being overlapped, and an effective filtering effect is realized. Finally, according to the adjusted phase information, an optical phase conjugation technique is used to generate a phase conjugation signal which is completely opposite to the original signal phase. This is typically achieved by nonlinear optical effects such as four-wave mixing or self-phase modulation. In this process, the original optical signal will interact with the local electric field in the nonlinear medium, producing a phase conjugate signal that is opposite in phase to the original signal.
The phase reconstruction algorithm converts the received optical signal into a digital representation of the phase information by digitally processing it. This process typically involves converting an optical signal into an electrical signal using an optical sensor or detector, and then converting the electrical signal into a digital signal by sampling and quantization techniques. This digital signal represents the amplitude and phase information of the optical signal. Next, the phase reconstruction algorithm converts the digital signal into a frequency domain representation by performing mathematical operations such as fourier transform or correlation analysis. In the frequency domain, phase information of the optical signal, i.e. the phase structure of the light wave at different frequency components, can be extracted. This process requires an operation using the complex domain to ensure that both amplitude and phase information of the signal are taken into account. Then, the phase reconstruction algorithm reconstructs the phase structure of the optical signal using the phase information extracted from the frequency domain. This process may employ interpolation, fitting, etc. techniques to convert discrete phase data into a continuous phase curve. By this step, a spatial phase distribution map of the light wave, i.e. the phase information of the light signal, can be obtained. In the phase reconstruction process, the phase data may be smoothed or denoised to improve accuracy and stability of the phase information. This may be achieved by filtering techniques or mathematical models to ensure that the reconstructed phase information accurately reflects the characteristics of the optical signal. Finally, after being processed by a phase reconstruction algorithm, the phase information of the optical signal is obtained, which is taken as the basis for generating a phase conjugate signal by a subsequent phase conjugate filter. The process ensures that the phase conjugate filter can effectively filter the optical signal, and improves the quality and transmission efficiency of the optical signal.
An 800G LPO silicon optical module is a high-speed optical communication device for transmitting data signals. The optical signal transmission device has a self-adaptive control function, and can adjust parameters of an optical signal in real time in a transmission process so as to ensure stability and reliability of the signal. This is particularly important in the face of complex optical communication environments, such as loss and dispersion effects present in optical fiber transmission. The optical transmitter is one of the core components of the 800G LPO silicon optical module and is responsible for transmitting optical signals. The method is characterized by high speed, low power consumption, strong stability and the like. In embodiment 1, the optical signal emitted from the optical transmitter is processed by the phase conjugate filter to improve the signal quality and the transmission efficiency. The phase conjugation filter is a key component in an 800G LPO silicon optical module, and performs filtering processing on a received optical signal by utilizing an optical phase conjugation technology. The phase conjugate filter can remove noise and distortion in the optical signal through a phase reconstruction algorithm and interference effect, so that the quality of the signal is improved. This is critical for high speed data transmission at 800 Gbps. The photodetector is responsible for converting the filtered optical signal into an electrical signal for subsequent electronic processing and analysis. The photoelectric conversion module adopts a preset photoelectric conversion model and combines parameters of optical signals, so that efficient photoelectric conversion can be realized. The self-adaptive control part is a key component part of the 800G LPO silicon optical module and is responsible for carrying out wave-front correction and optical path compensation on the electric signal so as to eliminate wave-front distortion and path loss in the signal transmission process. The self-adaptive control part can respond to the change of the transmission environment in real time by dynamically adjusting the transmitting power of the light transmitter and the amplification factor of the amplifier, thereby ensuring the stable transmission of signals.
Example 2: the phase conjugate filter includes: a phase reconstruction unit and a phase conjugate mirror; the phase conjugate mirror is a stimulated Raman scattering mirror or a nonlinear crystal.
In particular, when an optical signal passes through the phase reconstruction unit, its phase structure will be accurately measured and reconstructed. This process typically involves advanced digital signal processing techniques that acquire phase information from the optical signal by sampling, fourier transforming, etc. The key of the phase reconstruction unit is that the phase distribution of the light wave can be accurately reconstructed, and accurate input is provided for subsequent phase conjugation processing. Next, let look at the action of the phase conjugate mirror. The phase conjugate mirror is an important component in embodiment 2, and uses stimulated raman scattering mirror or nonlinear crystal. These materials have nonlinear optical properties that are capable of converting an input optical signal into a phase conjugate signal having an opposite phase. In stimulated raman scattering mirrors, the optical signal interacts with molecules in the crystal to produce raman scattered light that is in exactly opposite phase to the input optical signal. In a nonlinear crystal, however, nonlinear optical effects occur when an optical signal propagates in the crystal, so that the phase of the optical signal is inverted. In this way, the phase conjugate mirror is able to convert the original optical signal into a phase conjugate signal having a completely opposite phase. Finally, the optical signal processed by the phase conjugate filter is obtained through the processing of the phase reconstruction unit and the phase conjugate mirror. The signal has the spectral characteristics after filtering treatment, noise and distortion are removed, and the quality and the transmission efficiency of the signal are improved. The phase conjugate filter is an important device in optical communication and optical signal processing, and can realize efficient processing and regulation of optical signals.
Example 3: the photoelectric conversion model is expressed using the following formula:
；
Wherein, Is an electrical signal; is the optical signal power; quantum efficiency of the photodetector; Is the receiving area; is the receiving rate of the optical signal; the time constant of the photoelectric detector is the time required by the photoelectric detector from the process of receiving the optical signal to generating the corresponding electric signal; Representing the duration of each bit for a symbol period; Is that Is the data rate of the optical signal in the 800G LPO silicon optical module; Is time.
Specifically, in the formulaThe magnitude of the electrical signal representing the output of the photodetector depends on a number of factors such as the power of the optical signal, the photoelectric conversion efficiency, the receiving area, the receiving rate, and the time constant. Optical signal powerRefers to the power level of the optical signal entering the photodetector, and the quantum efficiencyThe efficiency of the photoelectric conversion, i.e. the ratio of the conversion of the optical signal into an electrical signal, is described. Receiving areaAnd a reception rateIndicating the reception performance of the photodetector, and the time constantThe response speed of photoelectric conversion is described. In the formulaRepresenting the symbol period, i.e. the time each bit lasts. This parameter takes into account the length of time each bit lasts in high-speed data communications, and is an important reference for data transmission. One term in the formulaThe response process of the photodetector is described. The response of the photodetector will gradually decay with time, a process that is defined by a time constantAnd (5) determining. Time constantThe smaller the response speed of the photodetector is, the faster the photodetector is. Finally, in the formulaThe effect of the duration of an optical signal on an electrical signal is described in part. This part takes into account the data rate of the optical signal, i.e. the number of bits transmitted per second. In the formula (i) the formula (ii),Representation ofData rate of (2), i.e. transmission per secondIs a data of (a) a data of (b). This term can be seen as an adjustment of the optical signal duration, affecting the output of the electrical signal. The formula of embodiment 3 comprehensively considers a plurality of factors such as optical signal power, photoelectric conversion efficiency, receiving performance, time constant, and data rate, and describes the process of converting an optical signal into an electrical signal through a photodetector. Through the formula, the performance of the photoelectric detector and the overall efficiency of the system can be quantitatively evaluated, and an important theoretical basis is provided for the design and optimization of an optical communication system.
Example 4: the adaptive control section calculates the corrected wavefront using the following formula:
；
Wherein, A corrected wavefront; is the original wavefront, i.e., the wavefront of the optical signal; coefficients for each correction pattern; Represent the first A correction pattern; Wavenumbers for each correction mode; a phase for each correction mode; Is the first The first correction modeCoefficients of the secondary correction modes; Is the first The first correction modeWavenumbers of the secondary correction modes; Is the first The first correction modeThe phases of the secondary correction modes; is the total number of correction modes; Is the total number of secondary correction modes; the correction mode includes: zernike polynomials, legendre polynomials, sine functions and cosine functions; the secondary correction mode includes: zernike polynomials, legendre polynomials, sine functions and cosine functions.
Specifically, the correction modeThe specific expression of (2) will generally depend on the particular requirements of the correction method and system chosen. In the formula described in step 2,Represent the firstThe correction pattern may be any function or pattern describing the shape of the wavefront.
Zernike polynomials are a set of orthogonal basis functions that are commonly used to describe the wavefront distortion of an optical system. First, theThe expressions of the Zernike polynomials can be usedIs expressed by, whereinAndRadial distance and angle in polar coordinates, the formula is generally as follows:
；
Legendre polynomials are also a set of orthogonal basis functions, commonly used to describe aberrations of optical systems. First, the The expression of the individual Legendre polynomials is typically of the form:
；
For describing periodic distortions or vibrations in an optical system. First, the The expression for the individual sine/cosine functions may be of the form:
。
The Zernike polynomials are a set of orthogonal basis functions used to describe the aberrations of an optical system. Each Zernike polynomial describes an aberration profile in the optical system, such as spherical aberration, defocus, astigmatism, etc. By adjusting the coefficients of the Zernike polynomials, the wavefront can be corrected accordingly to improve the aberration effect. Consider an optical system whose wavefront exhibits a spherical aberration effect, i.e., the wavefront exhibits a concave-convex shape at a center point. At this time, the spherical aberration Zernike polynomials may be used for correction, and the coefficients are adjusted to restore the wavefront to a flat shape.
Legendre polynomials are a class of orthonormal polynomials commonly used to describe the aberration or light field distribution of an optical system. They can describe the uniformity, polarization state, etc. characteristics of the light field. It is assumed that one optical system has oblique aberration, i.e., the center position of the light beam is deviated from the optical axis. At this point, correction can be made using the Legendre polynomial to realign the beam to the optical axis by adjusting the coefficients.
Sine and cosine functions: the sine function and cosine function are used to describe the periodic variation or oscillation of the optical signal. They are commonly used to correct for periodic aberrations or fluctuations in the optical system. In an optical system, there may be periodic aberration due to mechanical vibration or environmental factors. At this time, correction may be performed using a sine function or a cosine function, and the coefficients may be adjusted to eliminate such periodic fluctuations.
In the formulaRepresenting the corrected wavefront, i.e. the wavefront of the optical signal processed by the adaptive control section. WhileThe original wavefront, i.e. the wavefront of the original optical signal input to the adaptive control part, is represented. By adjustingAnd superposition of multiple correction modes, accurate adjustment and correction of the wavefront can be achieved. In the formulaA coefficient representing each correction pattern for adjusting the intensity or weight of each correction pattern. WhileThen represent the firstThe correction modes can be Zernike polynomials, legendre polynomials, sine functions or cosine functions, etc. These correction modes include the types of wavefront distortion common in optical systems, and can be corrected for different wavefront distortions. In the formulaThe effect of the correction mode and the secondary correction mode on the wavefront is described in part. This part enables the adjustment of the wavefront by superposition of each correction pattern while taking into account the influence of the secondary correction pattern, so that the wavefront correction is more comprehensive and accurate. Parameters in the formulaAndRepresenting the total number of correction modes and secondary correction modes, respectively. These modes include Zernike polynomials, legendre polynomials, sine functions, cosine functions, etc., can cover various wavefront distortion conditions, and provide wide applicability for wavefront correction. The equation of example 4 achieves adaptive adjustment and correction of the wavefront by superposition of the original wavefront and multiple correction modes. By adjusting the coefficients of the correction modes and selecting different correction modes, accurate correction can be performed for different wavefront distortion conditions, thereby improving the quality and transmission performance of the optical signal.
Example 5: the adaptive control section calculates an electric signal after the wavefront correction using the following formula:
；
Wherein, For the wavefront corrected electrical signal, i.e. the first intermediate signal; Is an imaginary symbol; Is an integral time variable.
Specifically, first, in the formulaRepresents an electric signal after wavefront correction, i.e., an electric signal into which an optical signal after being processed by the adaptive control section is converted, and is also referred to as a first intermediate signal. In an optical communication system, an optical signal is affected by wavefront distortion during transmission, and thus wavefront correction is required to improve signal quality. Second, in the formulaIs an imaginary symbol, is a constant, and is used to control the degree of influence of the wavefront correction. By adjustingThe magnitude of the influence of the wavefront correction on the electrical signal can be adjusted. Larger sizeThe values mean stronger wavefront correction effects, but smallerThe value then represents a weaker wavefront correction effect. Next, in the formulaIs an integration time variable representing the time range of integration. In this formula, the response of the optical signal over a period of time is integrated to calculate a corrected electrical signal. Integration time rangeThe observation window for the response of the optical signal is determined and can be adjusted according to the specific situation. In the formulaThe calculation of the corrected electrical signal is described in part. In this integration, the influence of the wavefront correction on the optical signal is first considered, whereinIs the wavefront after the wavefront correction. Wavefront correction affects the phase of the optical signal and thus affects the transmission and reception process of the optical signal. WhileRepresenting the time attenuation factor taking into account the time attenuation effect of the optical signal during transmission. From this integration, an electrical signal after wavefront correction of the optical signal over a period of time can be calculated. The formula of embodiment 5 describes a calculation process of an electric signal after the optical signal is subjected to wavefront correction by the adaptive control section. By taking the influence of wavefront correction on the optical signal and the time attenuation effect into consideration, a corrected electrical signal can be obtained, thereby improving the quality and transmission performance of the optical signal.
Example 6: the adaptive control section calculates a frequency spectrum of the first intermediate signal for adaptive optical path compensation using the following formula:
；
Wherein, The spectrum after the self-adaptive optical path compensation is carried out; is the original spectrum, i.e., the spectrum of the optical signal; is the frequency domain response of the phase conjugate mirror; to compensate for the center frequency; to compensate for the frequency range; the order of the phase conjugate mirror; recalculating the spectrum after self-adaptive optical path compensation Is of the spectral amplitude of (2)Will spectrum amplitudeBy multiplying the first intermediate signal by the second intermediate signal,A second intermediate signal is obtained.
Specifically, in the formulaRepresenting the spectrum after the adaptive optical path compensation, i.e. the spectrum after the optical path compensation of the first intermediate signal. The purpose of optical path compensation is to adjust the spectrum of the optical signal to reduce or eliminate distortion caused by the transmission of the optical signal. Secondly, the first step of the method comprises the steps of,The spectrum representing the original spectrum, i.e., the spectrum of the optical signal, is the spectrum of the original optical signal input to the adaptive control section. By analyzing the original spectrum, the frequency offset and distortion of the optical signal during transmission can be known. Next to this, the process is carried out,Representing the frequency domain response of the phase conjugation mirror, the response of the phase conjugation mirror at different frequencies is described. The phase conjugate mirror is a key component for self-adaptive optical path compensation, and realizes wave front correction by adjusting the phase of an optical signal, so that the transmission performance of the optical signal is improved. In the formula (i) the formula (ii),Is the compensated center frequency, the compensated center position is specified.Then the compensated frequency range is indicated. These two parameters determine the range and the center position of the compensation, which affects the adjustment and the accuracy of the compensation effect. In the formulaThe calculation of the compensated spectrum is described in part. This term is a modified Lorentzian function that describes the adjustment of the frequency response during compensation. It considers the adjustment effect of the compensation center frequency and the compensation frequency range on the frequency spectrum by adjusting parametersThe shape of the compensation and the degree of attenuation can be controlled. Finally, the spectrum after self-adaptive optical path compensation is calculatedIs of the spectral amplitude of (2)And multiply it by a first intermediate signalA second intermediate signal is obtained. This procedure describes the adjustment of the spectral amplitude and the generation of the second intermediate signal of the optical signal after the adaptive optical path compensation. The formula describes the procedure in which the adaptive control section calculates the spectrum of the first intermediate signal after the adaptive optical path compensation. By considering the frequency domain response of the phase conjugate mirror, the compensation center frequency and the compensation frequency range, and the adjustment of the compensation effect, the accurate adjustment of the spectrum of the optical signal can be realized, thereby improving the transmission quality and performance of the optical signal.
Example 7: amplification factor when amplifying the second intermediate signal by the amplifierThe method is calculated by the following formula:
；
Wherein, The initial magnification is set value; Is an amplification parameter; Is the magnitude of the current error signal; The amplitude of the reference error signal.
Specifically, the amplification factor of the amplifierRefers to the multiple relationship between the output signal and the input signal of the amplifier. The amplitude of the signal can be controlled by adjusting the amplification factor, so that the quality and stability of the signal are affected. In practical applications, the adjustment of the magnification is generally dynamically adjusted according to the requirements and the working state of the system. Second, in the formulaIs the initial amplification factor, is a preset value and represents the amplification factor of the amplifier in the initial working state. It can be set according to the requirements of system design and performance indexes. Next to this, the process is carried out,Is an amplification parameter for fine tuning and correcting the magnification. By adjustingThe amplification factor can be properly adjusted according to actual conditions so as to meet specific amplification requirements. In the formula (i) the formula (ii),Partly describe magnificationIs performed in the correction process of (a). This part takes into account the amplitude of the current error signalAmplitude of error signal with referenceRelationship between them. By comparing the magnitudes of the current error signal and the reference error signal, it can be determined whether a correction to the magnification is required. In particular, when the amplitude of the current error signal is equal to the amplitude of the reference error signal,The value of the part is 1, and the magnification is not corrected; when the amplitude of the current error signal is not equal to the amplitude of the reference error signal, the value of the part is not 1, and the amplification factor is correspondingly corrected. The formula describes the calculation of the amplification factor when the amplifier amplifies the second intermediate signal. By considering the relation between the current error signal and the reference error signal and by adjusting the initial amplification factor and the amplification parameter, the dynamic adjustment and correction of the amplification factor can be realized, thereby improving the amplification quality and stability of the signal.
Example 8: the adaptive control section performs error rate detection on the amplified second intermediate signal by the following formula:
；
Wherein, Bit error rate is used as the error rate detection result; Energy per bit; Is the single sideband noise power spectral density; As a function of the residual error.
Specifically, first, bit Error Rate (BER) refers to the probability that each bit is received in error during transmission in a digital communication system. It is an important performance index, directly affecting the reliability and performance of the system. By detecting the error rate of the second intermediate signal, the error code performance of the system can be evaluated in time, so that corresponding adjustment and optimization can be performed. Second, in the formulaRepresenting energy per bit refers to the energy carried by each bit.Then the single sideband noise power spectral density describes the power ratio between the signal and the noise. These two parameters directly affect the result of the bit error rate calculation,The ratio of (2) determines the signal quality and the noise interference level, and thus affects the bit error rate. Next, in the formulaIs a residual error function, is a complementary function of the gaussian distribution function, and is used to describe the probability density of the gaussian distribution curve tail. In the case of the detection of the bit error rate,The parameters of the function are functions of the signal-to-noise ratio, which describe the probability of an error occurring at a given signal-to-noise ratio. The calculation process in the formula is that firstlySquare root operation is performed on the ratio of (2) and then the result is taken as a parameter to be inputThe calculation is performed in the function. This section describes an estimate of the bit error rate for a given signal-to-noise ratio. By adjusting the amplification factor of the amplifier and other system parameters, the signal to noise ratio can be influenced, and the calculation result of the error rate can be further influenced. The formula describes a procedure in which the adaptive control section evaluates the error rate of the amplified second intermediate signal by error rate detection. By calculating the bit error rate, the performance of the system can be timely estimated, and the system can be adjusted and optimized according to the estimation result so as to improve the reliability and performance of the digital communication system.
Example 9: an adaptive control section for calculating a power adjustment amount for adjusting the transmission power of the optical transmitter based on the result of the error rate detection by the following formula：
；
Wherein,The partial derivative of the bit error rate to the transmitting power is used for representing the sensitivity degree of the bit error rate to the transmitting power; Is the boltzmann constant, representing the intensity of thermal noise; Is the temperature Representing the derivative of the optical signal spectrum with respect to frequency, representing the rate of change of the optical signal spectrum; recalculating the power adjustmentAnd the sum of the transmission power, the dynamic adjustment of the transmission power of the light emitter is completed.
Specifically, first, in the formulaIs the partial derivative of the bit error rate with respect to the transmit power and represents the sensitivity of the bit error rate to the transmit power. This term tells how the bit error rate will change accordingly when the transmit power changes. If it isA larger value of (c) means that the bit error rate is very sensitive to variations in the transmit power, requiring a smaller amount of adjustment to keep the bit error rate within an acceptable range. Second, in the formulaThe derivative of the optical signal spectrum with respect to frequency is partially represented by a coefficient. This section describes the rate of change of the spectrum of the optical signal, i.e. the rate at which the optical signal changes with the change of frequency. If the rate of change of the spectrum of the optical signal is large, meaning that the energy distribution of the optical signal at different frequencies is changed greatly, the transmit power needs to be adjusted accordingly. In the formula, the boltzmann constant describes the intensity of thermal noise, whereas the temperatureThe temperature of the system is indicated. These two parameters directly affect the noise level of the system and thus the amount of adjustment of the transmit power. When the temperature of the system changes, the noise level also changes, and the adjustment of the error rate and the transmitting power of the system is further affected. Finally, according to the calculated power adjustment quantityAnd the sum of the transmission power, the dynamic adjustment of the transmission power of the light transmitter is completed. The process dynamically adjusts the transmitting power according to the actual condition and the requirement of the system so as to achieve the optimal system performance and error rate. By constantly monitoring the change of the error rate and the change condition of the spectrum of the optical signal, the system can realize the real-time adjustment of the transmitting power, thereby ensuring the stability and the reliability of the communication system.
Example 10: an adaptive control part for calculating the amplification adjustment amount of the amplifier according to the error rate detection result by the following formula：
；
Wherein,The partial derivative of the error rate to the gain represents the sensitivity degree of the error rate to the gain; : the derivative of the frequency domain response of the phase conjugation mirror to frequency represents the rate of change of the frequency domain response of the phase conjugation mirror; re-calculating the amplification adjustment amount And magnification ofAnd (3) dynamically adjusting the amplification factor of the amplifier.
Specifically, in the formulaIs the partial derivative of the error rate to the amplification factor and represents the sensitivity of the error rate to the amplification factor. This term tells how the bit error rate will change accordingly when the magnification changes. If it isA larger value of (c) means that the bit error rate is very sensitive to changes in magnification, requiring a smaller amount of adjustment to keep the bit error rate within an acceptable range. Second, in the formulaPart shows the derivative of the frequency domain response of the phase conjugate mirror with respect to frequency multiplied by a certain coefficient. This section describes the rate of change of the frequency domain response of the phase conjugate mirror, i.e. the rate at which the frequency domain response of the phase conjugate mirror changes with the change of frequency. If the frequency domain response of the phase conjugate mirror varies with frequency, this means that the system requires a greater amount of adjustment to maintain the stability and performance of the system. Finally, according to the calculated amplified adjustment amountAnd magnification ofAnd the dynamic adjustment of the amplification factor of the amplifier is completed. The process can dynamically adjust the amplification factor according to the actual situation and the requirement of the system so as to achieve the optimal system performance and error rate. The formula realizes the dynamic adjustment of the amplification factor of the amplifier by comprehensively considering the sensitivity degree of the error rate to the amplification factor and the change rate of the frequency domain response of the phase conjugate mirror. The process fully considers the actual running condition of the system, can effectively optimize the system performance and improves the reliability and stability of the communication system. By continuously monitoring the change of the error rate and the change condition of the frequency domain response of the phase conjugate mirror, the system can realize the real-time adjustment of the amplification factor of the amplifier, thereby ensuring the stability and the reliability of the communication system.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; while the invention has been described in detail with reference to the foregoing embodiments, it will be appreciated by those skilled in the art that variations may be made in the techniques described in the foregoing embodiments, or equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An 800G LPO silicon optical module with adaptive control, comprising: the optical transmitter, the phase conjugate filter, the photoelectric detector and the self-adaptive control part; the light emitter is used for emitting light signals; the phase conjugate filter is configured to perform optical filtering processing based on optical phase conjugation on a received optical signal, and specifically includes: processing the optical signal by using a phase reconstruction algorithm, reconstructing phase information of the optical signal, generating an optical signal with the phase completely opposite to that of the optical signal, namely, a phase conjugate signal by using an optical phase conjugation technology, superposing the optical signal and the phase conjugate signal to cause interference, separating the optical signal after interference, removing the part offset by the interference, and completing filtering; the photoelectric detector is used for converting the optical signal into an electric signal based on the filtered optical signal by using a preset photoelectric conversion model and combining parameters of the optical signal; the self-adaptive control part is used for carrying out wave-front correction on the electric signal so as to compensate wave-front distortion of the optical signal in the transmission process and obtain a first intermediate signal; performing self-adaptive optical path compensation on the first intermediate signal to eliminate loss in an optical signal transmission path and obtain a second intermediate signal; and amplifying the second intermediate signal by using an amplifier, detecting the error rate of the amplified second intermediate signal, and dynamically adjusting the transmitting power of the optical transmitter and the amplification factor of the amplifier according to the error rate detection result.
2. The 800G LPO silicon optical module with adaptive control of claim 1, wherein the phase conjugate filter comprises: a phase reconstruction unit and a phase conjugate mirror; the phase conjugate mirror is a stimulated Raman scattering mirror or a nonlinear crystal.
3. The 800G LPO silicon optical module with adaptive control of claim 1, wherein the photoelectric conversion model is expressed using the following formula:
；
Wherein, Is an electrical signal; is the optical signal power; quantum efficiency of the photodetector; Is the receiving area; is the receiving rate of the optical signal; the time constant of the photoelectric detector is the time required by the photoelectric detector from the process of receiving the optical signal to generating the corresponding electric signal; Representing the duration of each bit for a symbol period; Is that Is the data rate of the optical signal in the 800G LPO silicon optical module; Is time.
4. The 800G LPO silicon optical module with adaptive control of claim 3, wherein the adaptive control section calculates the corrected wavefront using the following formula:
；
Wherein, A corrected wavefront; is the original wavefront, i.e., the wavefront of the optical signal; coefficients for each correction pattern; Represent the first A correction pattern; Wavenumbers for each correction mode; a phase for each correction mode; Is the first The first correction modeCoefficients of the secondary correction modes; Is the first The first correction modeWavenumbers of the secondary correction modes; Is the first The first correction modeThe phases of the secondary correction modes; is the total number of correction modes; Is the total number of secondary correction modes; the correction mode includes: zernike polynomials, legendre polynomials, sine functions and cosine functions; the secondary correction mode includes: zernike polynomials, legendre polynomials, sine functions and cosine functions.
5. The 800G LPO silicon optical module with adaptive control according to claim 3, wherein the adaptive control section calculates the electric signal after the wavefront correction using the following formula:
；
Wherein, For the wavefront corrected electrical signal, i.e. the first intermediate signal; Is an imaginary symbol; Is an integral time variable.
6. The 800G LPO silicon optical module with adaptive control of claim 5, wherein the adaptive control section calculates a frequency spectrum of the first intermediate signal for adaptive optical path compensation using the formula:
；
Wherein, The spectrum after the self-adaptive optical path compensation is carried out; is the original spectrum, i.e., the spectrum of the optical signal; is the frequency domain response of the phase conjugate mirror; to compensate for the center frequency; to compensate for the frequency range; the order of the phase conjugate mirror; recalculating the spectrum after self-adaptive optical path compensation Is of the spectral amplitude of (2)Will spectrum amplitudeBy multiplying the first intermediate signal by the second intermediate signal,A second intermediate signal is obtained.
7. The adaptively controlled 800G LPO silicon optical module as in claim 6, wherein the amplifier amplifies the second intermediate signal by a amplification factor ofThe method is calculated by the following formula:
；
Wherein, The initial magnification is set value; Is an amplification parameter; Is the magnitude of the current error signal; The amplitude of the reference error signal.
8. The 800G LPO silicon optical module with adaptive control of claim 7, wherein the adaptive control section performs error rate detection on the amplified second intermediate signal by the following formula:
；
Wherein, Bit error rate is used as the error rate detection result; Energy per bit; Is the single sideband noise power spectral density; As a function of the residual error.
9. The 800G LPO silicon optical module with adaptive control of claim 8, wherein the adaptive control part calculates the power adjustment amount for adjusting the emission power of the optical transmitter according to the error rate detection result by the following formula：
；
Wherein,The partial derivative of the bit error rate to the transmitting power is used for representing the sensitivity degree of the bit error rate to the transmitting power; Is the boltzmann constant, representing the intensity of thermal noise; Is the temperature; representing the derivative of the optical signal spectrum with respect to frequency, representing the rate of change of the optical signal spectrum; recalculating the power adjustment And the sum of the transmission power, the dynamic adjustment of the transmission power of the light emitter is completed.
10. The 800G LPO silicon optical module with adaptive control as set forth in claim 9, wherein the adaptive control section calculates the amplification adjustment amount of the amplifier according to the error rate detection result by the following formula：
；
Wherein,The partial derivative of the error rate to the gain represents the sensitivity degree of the error rate to the gain; : the derivative of the frequency domain response of the phase conjugation mirror to frequency represents the rate of change of the frequency domain response of the phase conjugation mirror; re-calculating the amplification adjustment amount And magnification ofAnd (3) dynamically adjusting the amplification factor of the amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410759684.7A CN118337289B (en) | 2024-06-13 | 2024-06-13 | 800G LPO silicon optical module with self-adaptive control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410759684.7A CN118337289B (en) | 2024-06-13 | 2024-06-13 | 800G LPO silicon optical module with self-adaptive control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118337289A CN118337289A (en) | 2024-07-12 |
| CN118337289B true CN118337289B (en) | 2024-08-09 |
Family
ID=91771085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410759684.7A Active CN118337289B (en) | 2024-06-13 | 2024-06-13 | 800G LPO silicon optical module with self-adaptive control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118337289B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115441958A (en) * | 2022-08-29 | 2022-12-06 | 武汉邮电科学研究院有限公司 | Signal processing method and system for analog coherent optical communication |
| CN117728892A (en) * | 2024-02-07 | 2024-03-19 | 深圳市光为光通信科技有限公司 | 1.6T LPO or CPO optical module optical signal elasticity self-adaptive processing method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3914222B2 (en) * | 1992-10-16 | 2007-05-16 | 富士通株式会社 | Optical communication system compensated for chromatic dispersion and phase conjugate light generator applicable to the system |
| JP3576546B2 (en) * | 1992-10-20 | 2004-10-13 | 富士通株式会社 | Application of phase conjugate optics to optical systems |
| JP7095390B2 (en) * | 2018-05-11 | 2022-07-05 | 富士通株式会社 | Wavelength converters, optical parametric amplifiers, transmission devices, and optical transmission systems |
-
2024
- 2024-06-13 CN CN202410759684.7A patent/CN118337289B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115441958A (en) * | 2022-08-29 | 2022-12-06 | 武汉邮电科学研究院有限公司 | Signal processing method and system for analog coherent optical communication |
| CN117728892A (en) * | 2024-02-07 | 2024-03-19 | 深圳市光为光通信科技有限公司 | 1.6T LPO or CPO optical module optical signal elasticity self-adaptive processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118337289A (en) | 2024-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2922219B1 (en) | Dispersion and nonlinearity compensation method and system in a coherent optical communication system | |
| EP1986333B1 (en) | Linearisation in an emission channel | |
| CN117728892B (en) | 1.6T LPO or CPO optical module optical signal elasticity self-adaptive processing method | |
| Felipe et al. | Chirp-filtering for low-complexity chromatic dispersion compensation | |
| JP4024342B2 (en) | Optical fiber transmission system | |
| CN118337289B (en) | 800G LPO silicon optical module with self-adaptive control | |
| JP6418973B2 (en) | Dispersion compensation method, optical signal transmitter, and optical communication system | |
| CN114826429B (en) | Sea water channel quantum invisible state communication method | |
| CN114422027B (en) | Vortex beam wave-front phase correction method based on Gerchberg-Saxton algorithm | |
| JP2021145171A (en) | Transmission line monitoring device and transmission line monitoring method | |
| CN111427147B (en) | Method for selecting wavefront corrector according to wavefront Zernike mode | |
| CN110855354B (en) | Measuring device for shaping index of all-optical regenerator | |
| CN113595641A (en) | Optical fiber nonlinear equalization method based on MA-DBP algorithm | |
| JP5586022B2 (en) | Frequency noise measuring apparatus and measuring method | |
| CN114337844B (en) | Phase compensation method, device, terminal and storage medium | |
| Wu et al. | QPSK training sequence-based both OSNR and chromatic dispersion monitoring in DWDM systems | |
| Jiang et al. | Joint time/frequency synchronization and chromatic dispersion estimation with low complexity based on a superimposed FrFT training sequence | |
| CN117061287A (en) | Improved Kramers-Kronig receiver algorithm without upsampling and low CSPR requirement | |
| CN116667931A (en) | Low-complexity nonlinear compensation method based on multi-input Coulomb operator | |
| Ke et al. | Coherent optical communication | |
| CN114978320B (en) | Method and device for optimizing performance of optical fiber communication system based on direct-tuning laser | |
| CN112255780A (en) | Coherent FSOC system based on SPGD algorithm | |
| Liu et al. | Blind phase search algorithm based on threshold simplification | |
| CN118573280B (en) | 800G LPO silicon optical module with automatic optical path optimization | |
| CN113300766B (en) | Self-adaptive distortion wavefront corrector based on LQG and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |