CN107533270A - Raman amplifiction light source, Raman amplifiction light-source system, raman amplifier, Raman amplification system - Google Patents

Raman amplifiction light source, Raman amplifiction light-source system, raman amplifier, Raman amplification system Download PDF

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Publication number
CN107533270A
CN107533270A CN201680022816.1A CN201680022816A CN107533270A CN 107533270 A CN107533270 A CN 107533270A CN 201680022816 A CN201680022816 A CN 201680022816A CN 107533270 A CN107533270 A CN 107533270A
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light
light source
raman
incoherent
raman amplifiction
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CN107533270B (en
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大越春喜
森本政仁
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Furukawa Electric Co Ltd
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Furukawa Electric Co Ltd
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Priority claimed from JP2015210487A external-priority patent/JP6774753B2/en
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Priority claimed from PCT/JP2016/064337 external-priority patent/WO2016182068A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser
    • H01S3/094046—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser of a Raman fibre laser
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06754—Fibre amplifiers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/0915—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
    • H01S3/094011—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre with bidirectional pumping, i.e. with injection of the pump light from both two ends of the fibre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094038—End pumping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
    • H01S3/2308—Amplifier arrangements, e.g. MOPA
    • H01S3/2316—Cascaded amplifiers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
    • H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S2301/00—Functional characteristics
    • H01S2301/02—ASE (amplified spontaneous emission), noise; Reduction thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/0915—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light
    • H01S3/0933—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of a semiconductor, e.g. light emitting diode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094096—Multi-wavelength pumping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

A kind of Raman amplifiction light source, for carrying out Raman amplifiction to the flashlight transmitted in optical delivery fiber, it possesses：Export multiple incoherent light sources of incoherent light；Multiple excitation light sources of second order excitation light of the output with the wavelength that Raman amplifiction is carried out to the incoherent light；It is attached with the multiple incoherent light source and the multiple excitation light source, Raman amplifiction and the Raman amplifiction optical fiber exported is carried out to the incoherent light by the second order excitation light；It is connected with the optical delivery fiber, the incoherent amplification light after carrying out Raman amplifiction with optical fiber by the Raman amplifiction is transfused to, and the incoherent amplification light is set to the single order excitation light with the wavelength that Raman amplifiction is carried out to the flashlight and is output to the output section of the optical delivery fiber.

Description

Raman amplifiction is put with light source, Raman amplifiction with light-source system, raman amplifier, Raman Big system
Technical field
The present invention relates to Raman amplifiction light source, Raman amplifiction light-source system, raman amplifier, Raman amplification system.
Background technology
In the past in fiber optic communication, using erbium-doped fiber amplifier (EDFA), to have carried out transmission range, transmission capacity Expand.But current, do not utilize Raman amplifiction effectively also using only EDFA, both are effectively combined as must can not Few technology.Currently, mainly used as Raman amplifiction, the optical fiber incident excitation light of Raman amplifiction is caused along with The backward excitation Raman amplifiction that the opposite direction in the direction of propagation of flashlight is propagated.But in order to towards it is follow-on more Add high speed (100Gb/s), long rangeization (100km transmission), broadband (L, S-band effective utilization), will be referred to as it is preceding to Excitation Raman amplifiction, the optical fiber incident excitation light of Raman amplifiction is caused along and flashlight direction of propagation identical direction The mode propagated is with backward excitation Raman amplifiction while using as crucial.Which is put referred to as two-way excitation Raman Greatly.In addition, following report be present, i.e. by using wavelength-division multiplex energisation mode, merely with backward excitation Raman amplifiction Planarizing, being broadband for Raman gain can be reached, but can not reach noise if two-way excitation Raman amplifiction is not utilized and refer to The planarization (non-patent literature 1,2) of number (NF).
Here, why explanation was except being widely used as 14XXnm wave band semiconductor laser moulds of the EDFA with excitation light source in the past Beyond block (LDM), the forward direction of incoherent (incoherent) is newly needed to encourage Raman amplifiction excitation light source.For Raman amplifiction Necessary main characteristic is listed below for the particularly preceding Raman amplifiction to excitation.
(1) low RIN transfers (Relative Intensity Noise：Relative intensity noise)
(2) low SBS (Stimulated Brillouin Scattering：Stimulated Brillouin scattering)
(3) low nonlinear effects
In addition, in order to tackle current wide band wave division multiplex transmission (DWDM transmission),
(4) it is required to control gain amplifier to carry out light amplification in wide band wavelength region.
So-called RIN, it is the index standardized with total light output to the small intensity variation component of laser.Raman Life-span of excitation level of the phenomenon of amplification due to producing gain it is shorter (Number fsec), if therefore existing in light source is encouraged Intensity noise is then directly by amplification process and the noise as flashlight.EDFA due to the lasting a long time of excitation level ( 10msec) so worrying in the absence of such.On Raman amplifiction, the gain of average per unit length compared with EDFA very It is small, but in forward direction encourages Raman amplifiction, because flashlight and excitation light are propagated together in a fiber in long range, so as to The noise of excitation light is slowly changed into the noise of flashlight.It this will be referred to as RIN transfers.In the rear Raman amplifiction to excitation, because Flashlight is relative with excitation light, so the time that the excitation light with certain noise component(s) and flashlight intersect is shorter, excitation light Noise influences less to caused by flashlight.Further, since the noise of excitation light is random, therefore even if flashlight by shadow Ring and be also averaged during relative advance.From the foregoing, it will be observed that forward direction excitation Raman amplifiction requires that RIN shifts low characteristic, It is particularly smaller with the group velocity difference of excitation light in flashlight and in optical fiber longer dispersion position of parallel time for being transmitted In shifting fiber (DSF) etc., the reduction of RIN transfers is critically important.
SBS is one of third-order nonlinear optical effect, is a part for light due to the sound as caused by light stimulus in a fiber The phenomenon learned phonon and rearward scattered.On excitation light, excitation light rearward scatters if SBS occurs, and will not effectively have Help Raman amplifiction, so it is not preferred.In general, if total light output intensity is identical, single-mode oscillation, swashing for narrow linewidth is exported The excitation light source of light easily produces SBS, so the quantity of increase oscillation longitudinal mode reduces the excitation of the light output of every longitudinal mode Light source suppresses SBS with can will not reducing Raman gain.If oscillation longitudinal mode is continuous and has the light source of wider spectrum width It then can more effectively suppress SBS.
Nonlinear effect can cause the distortion of flashlight, cause communication quality to deteriorate, so must avoid.Current light leads to Letter is typically all wavelength division multiplexing communications, even if the power (power) of the flashlight of a wavelength is smaller, by multiplexing so as to overall Power become big.Such as even if the power of the flashlight of each wavelength is 1mW, overall power turns into if 100 ripple multiplexings are carried out 100mW.When carrying out light amplification to flashlight to compensate the loss of transmission path, if putting with lumped constant type as EDFA Flashlight is amplified by big device quickly in certain opening position, then because the power of the flashlight after the amplification is imported into quickly In transmission path, therefore easily cause nonlinear effect.In order to avoid this case, with the various distributions of Raman amplifiction It is highly advantageous that constant type amplifier, which is gradually amplified,.But in forward direction encourages Raman amplifiction, in the incidence of transmission path Side, raman amplification gain exceed the transmission loss of the optical fiber as transmission path, the power of the flashlight in the part fiber More than the power at the incidence end of flashlight, easily cause nonlinear effect.In order to avoid this case, it have studied and Raman is swashed High-order of the Raman amplifiction untill it can be used as the excitation light of flashlight the wavelength that uses is repeated with encouraging lighting level connection to draw Graceful amplification.For example, it is such principle, i.e. is used to carry out Raman amplifiction to the flashlight of 1550nm wave bands The excitation light of the wavelength of 1450nm degree, but the excitation light of the wavelength of 1350nm degree is now utilized to 1450nm excitation light Raman amplifiction is carried out, the excitation light of the 1450nm after the Raman amplifiction carries out Raman amplifiction to the flashlight of 1550nm wave bands.It is logical Cross so, so as to transmission path incidence end, to flashlight carry out Raman amplifiction 1450nm excitation luminous power it is smaller, because And the Raman gain of the flashlight of 1550nm wave bands is smaller, as flashlight is transmitted, 1450nm excitation light passes through 1350nm excitation light and be exaggerated, so as to which the Raman gain of the flashlight for 1550nm wave bands becomes big.Thus, if as biography On the whole, then the loss of transmission path and Raman gain eliminate well in defeated path, so as to regard the biography just as optical fiber as Defeated loss is transmission path as 0, can further reduce nonlinear effect.Now, 1450nm excitation light is referred to as one Rank excitation light, is referred to as second order excitation light by 1350nm excitation light, and the system is referred to as into second order excitation system.Based on same original Reason, three ranks, the Raman excitation system of high-order as quadravalence, but even such Higher-order Raman excitation system are have studied, is The transmission of high-quality, low RIN transfers, low SBS are also necessary.
In the past, in order to solve 4 above-mentioned problems, various technologies (non-patent literature 3,4, patent text are disclosed Offer 1~4).
Citation
Patent document
Patent document 1：No. 3676167 publications of Japanese Patent No.
Patent document 2：No. 07190861 specification of U.S. Patent No.
Patent document 3：No. 07215836 specification of U.S. Patent No.
Patent document 4：No. 07233431 specification of U.S. Patent No.
Non-patent literature
Non-patent literature 1：S.Kado、Y.Emori、S.Namiki、N.Tsukiji、J.Yoshida、and T.Kimura： ECOC′01(2001)、PD Paper 1.8.
Non-patent literature 2：Jiang Sen, door, and wood：" the noise figure frequency spectrum of the raman amplifier based on two-way energisation mode Design " Furukawa Times, No. 111 (2003), page 10
Non-patent literature 3：The forward direction excitation Raman amplifiction exploitation of excitation light source, Furukawa Times, in July, 2003, No.112, the 5-10 pages
Non-patent literature 4：Kafing Keita、Philippe Delaye、Robert Fray and Gerald Roosen、″Relative intensity noise transfer of large-bandwidth pump lasers in Raman fiber、″Journal of Optical Society America B、Vol.23、No.12、pp.2479-2485、 December 2006.
The content of the invention
The invention problem to be solved
But it is possible to solve the Raman amplifiction light source of 4 above-mentioned problems, Raman amplifiction light-source system simultaneously, draw Graceful amplifier and Raman amplification system not yet realize the characteristic for the degree for reaching practical.
The present invention in view of the above and make, its object is to provide a kind of Raman that can solve 4 problems simultaneously to put Use light source, Raman amplifiction light-source system, raman amplifier and Raman amplification system greatly.
Means for solving the problems
In order to solve above-mentioned problem, reached purpose, the Raman amplifiction involved by of the invention mode is with light source For carrying out Raman to the flashlight transmitted in the optical delivery fiber by the stimulated Raman scattering phenomenon in optical delivery fiber The Raman amplifiction light source of amplification, it is characterised in that possess：Multiple incoherent light sources, export incoherent light；Multiple excitation lights Source, second order excitation light of the output with the wavelength that Raman amplifiction is carried out to the incoherent light；Raman amplifiction optical fiber, it is and described Multiple incoherent light sources and the multiple excitation light source connection, pass through the second order excitation light that is inputted to the institute that is inputted Incoherent light is stated to carry out Raman amplifiction and export；And output section, it is connected, is transfused to by the Raman with the optical delivery fiber Amplification optical fiber carries out the incoherent amplification light after Raman amplifiction, and the incoherent amplification light is set to have to the signal Light carries out the single order excitation light of the wavelength of Raman amplifiction and is output to the optical delivery fiber.
The present invention a mode involved by Raman amplifiction light source be characterised by, the multiple incoherent light source with And the multiple excitation light source is connected with the Raman amplifiction with optical fiber so that the second order excitation light is entered to the incoherent light To excitation before row.
The present invention a mode involved by Raman amplifiction light source be characterised by, the multiple incoherent light source with And the multiple excitation light source is connected with the Raman amplifiction with optical fiber so that the second order excitation light is entered to the incoherent light The backward excitation of row.
Raman amplifiction light source involved by the mode of the present invention is characterised by that the output section passes with the light Lose fine connection so that the single order excitation light carries out preceding to excitation to the flashlight.
Raman amplifiction light source involved by the mode of the present invention is characterised by that the output section passes with the light Lose fine connection so that the single order excitation light is encouraged backward to the flashlight.
The present invention a mode involved by Raman amplifiction with light source be used for by optical delivery fiber to the light pass Lose the Raman amplifiction light source that the flashlight transmitted in fibre carries out Raman amplifiction, it is characterised in that possess：Multiple incoherent lights Source, export incoherent light；Multiple excitation light sources, second order of the output with the wavelength that Raman amplifiction is carried out to the incoherent light swash Encourage light；And output section, it is connected with the multiple incoherent light source, the multiple excitation light source and the optical delivery fiber, and The incoherent light inputted and the second order excitation light are carried out into output to cause in the optical delivery fiber along same Direction is propagated, and in the optical delivery fiber, passes through the second order excitation light that is inputted to the incoherent light that is inputted Carry out Raman amplifiction, single order excitation light of the generation with the wavelength that Raman amplifiction is carried out to the flashlight.
Raman amplifiction light source involved by the mode of the present invention is characterised by possessing：Encourage light source, output tool There is the excitation light for the wavelength that Raman amplifiction is carried out at least one exported second order excitation light in the multiple excitation light source.
The present invention a mode involved by Raman amplifiction light source be characterised by, the multiple incoherent light source bag Containing super-radiance light emitting diode, semiconductor optical amplifier and possesses the amplified spontaneous emission source of terres rares addition optical fiber extremely It is few one.
The present invention a mode involved by Raman amplifiction light source be characterised by, the multiple incoherent light source bag Containing with super-radiance light emitting diode and semiconductor optical amplifier and being configured to by semiconductor optical amplifier to from superradiance The incoherent light of light emitting diode output carries out light amplification and the incoherent light source exported.
The present invention a mode involved by Raman amplifiction light source be characterised by, the multiple incoherent light source bag Containing the incoherent light source for forming the multistage connection of semiconductor optical amplifier.
Raman amplifiction light source involved by the mode of the present invention is characterised by that the multiple excitation light source includes Fabry-Perot type, the Fabry-Perot-optical fiber Bragg for combining Fabry-Perot type and Fiber Bragg Grating FBG The semiconductor laser of grating type, distributed feedback and DBR type it is at least one.
The present invention a mode involved by Raman amplifiction light source be characterised by, the multiple incoherent light source bag Incoherent light source containing the incoherent light for exporting mutually different wave band.
Raman amplifiction light-source system involved by the mode of the present invention is characterised by possessing one of the present invention Raman amplifiction light source involved by mode and the Raman amplifiction light source involved by the mode of the present invention, each Raman The output section of amplification light source is connected with the optical delivery fiber so that the single order excitation light carries out two-way to the flashlight Excitation.
Raman amplifiction light-source system involved by the mode of the present invention is characterised by, possess two it is of the invention Raman amplifiction light source involved by one mode, output section and the optical delivery fiber of each Raman amplifiction light source connect Connect so that the single order excitation light carries out two-way excitation to the flashlight.
The present invention a mode involved by Raman amplifiction with light-source system be used for by optical delivery fiber at this The flashlight transmitted in optical delivery fiber carries out the Raman amplifiction light-source system of Raman amplifiction, it is characterised in that possesses：1st Light source portion, possesses：Export incoherent light more than the 1st individual incoherent light sources and with individual incoherent light source more than the described 1st and described Optical delivery fiber connects and the incoherent light is output to the 1st output section of the optical delivery fiber；And the 2nd light source portion, Possess：More than the 1st excitation light sources of second order excitation light of the output with the wavelength that Raman amplifiction is carried out to the incoherent light and It is connected with more than the described 1st excitation light sources and the optical delivery fiber and the second order excitation light is output to the optical transport 2nd output section of optical fiber, the 1st output section and the 2nd output section are connected with the optical delivery fiber so that the non-phase Dry light and the second order excitation light are between the 1st output section and the 2nd output section along phase in the optical delivery fiber Opposite direction is propagated, defeated by institute in the optical delivery fiber between the 1st output section and the 2nd output section The second order excitation light entered carries out Raman amplifiction to the incoherent light inputted, and generation has to be carried out to the flashlight The single order excitation light of the wavelength of Raman amplifiction.
Raman amplifiction light-source system involved by the mode of the present invention is characterised by that the 2nd light source portion has More than the 2nd individual incoherent light sources of the 2nd incoherent light of standby output, the 2nd incoherent light has to be carried out by the second order excitation light The wavelength of Raman amplifiction, the 1st light source portion possess more than the 2nd excitation light sources of the 2nd second order excitation light of output, the 2nd second order Excitation light have to the 2nd incoherent light carry out Raman amplifiction wavelength, the 2nd output section in the 2nd light source portion with it is described The connection of individual incoherent light source more than 2nd, the 2nd incoherent light is output to the optical delivery fiber, the of the 1st light source portion 1 output section is connected with more than the described 2nd excitation light sources, and the 2nd second order excitation light is output into the optical delivery fiber, described 1st output section and the 2nd output section are connected with the optical delivery fiber so that the 2nd incoherent light and the 2nd second order Excitation light is propagated in opposite direction between the 1st output section and the 2nd output section in the optical delivery fiber, In the optical delivery fiber between the 1st output section and the 2nd output section, pass through the 2nd second order inputted Excitation light carries out Raman amplifiction to the 2nd incoherent light inputted, and generation has carries out Raman amplifiction to the flashlight Wavelength the 2nd single order excitation light.
The present invention a mode involved by Raman amplifiction light-source system be characterised by, the multiple incoherent light Source includes super-radiance light emitting diode, semiconductor optical amplifier and the amplified spontaneous emission source for possessing terres rares addition optical fiber It is at least one.
The present invention a mode involved by Raman amplifiction light-source system be characterised by, the multiple incoherent light Source includes with super-radiance light emitting diode and semiconductor optical amplifier and is configured to by semiconductor optical amplifier to from super The incoherent light of radiation light emitting diode output carries out light amplification and the incoherent light source exported.
The present invention a mode involved by Raman amplifiction light-source system be characterised by, the multiple incoherent light Source includes the incoherent light source for forming the multistage connection of semiconductor optical amplifier.
The present invention a mode involved by Raman amplifiction light-source system be characterised by, the multiple excitation light source Include the mutually different Fabry-Perot type of wavelength, the method cloth for combining Fabry-Perot type and Fiber Bragg Grating FBG In-Perot-Fiber Bragg Grating FBG type, distributed feedback and DBR type semiconductor laser at least one It is individual.
The present invention a mode involved by Raman amplifiction light-source system be characterised by, the multiple incoherent light Source includes the incoherent light source for the incoherent light for exporting mutually different wave band.
Raman amplifier involved by the mode of the present invention is characterised by possessing：The mode institute of the present invention The Raman amplifiction light source or Raman amplifiction light-source system that are related to and the optical delivery fiber.
Raman amplification system involved by the mode of the present invention is characterised by possessing：The mode of the present invention Involved Raman amplifiction light source or Raman amplifiction light-source system and the optical delivery fiber.
Invention effect
According to the present invention, acquirement can realize that the Raman amplifiction that can solve 4 problems simultaneously is used up with light source, Raman amplifiction Source system, raman amplifier and effect as Raman amplification system.
Brief description of the drawings
Fig. 1 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 1 Figure.
Fig. 2 is the figure of one of the structure for representing WDM couplers.
Fig. 3 is the figure of another of the structure for representing WDM couplers.
Fig. 4 is the figure of one of the configuration for representing incoherent light and the wavelength of second order excitation light.
Fig. 5 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 2 Figure.
Fig. 6 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 3 Figure.
Fig. 7 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 4 Figure.
Fig. 8 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 5 Figure.
Fig. 9 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 6 Figure.
Figure 10 be used the Raman amplifiction light-source system involved by embodiment 7 Raman amplification system it is schematic Structure chart.
Figure 11 be used the Raman amplifiction light-source system involved by embodiment 8 Raman amplification system it is schematic Structure chart.
Figure 12 be used the Raman amplifiction light-source system involved by embodiment 9 Raman amplification system it is schematic Structure chart.
Figure 13 is the signal for the Raman amplification system for having used the Raman amplifiction light-source system involved by embodiment 10 Property structure chart.
Figure 14 is the figure of the example for the structure for representing incoherent light source.
Embodiment
Hereinafter, Raman amplifiction involved in the present invention is put with light source, Raman amplifiction with light-source system, Raman referring to the drawings The embodiment of big device and Raman amplification system is described in detail.In addition, the present invention is not limited to these embodiments. In addition, in the drawings, identical symbol is suitably marked for identical or corresponding key element.
(embodiment 1)
Fig. 1 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 1 Figure.As shown in figure 1, Raman amplification system 100 is applied to optical transmission system 1000, optical transmission system 1000 possesses：Send 1.55 μ The WDM signal light of m wave bands is flashlight S1 transmitter 1001；Light as the transmission path being transmitted to flashlight S1 passes Lose fibre 1002；With reception signal light S1 receiver 1003.Raman amplification system 100 is passed by Raman amplifiction with light source 10 and light Fibre 1002 is lost to form.In addition, Raman amplification system 100 and each embodiment party as shown below involved by present embodiment 1 Raman amplification system involved by formula is also configured to raman amplifier.
Raman amplifiction light source 10 possesses：Multiple incoherent light sources 11, multiple excitation light sources 12, WDM couplers 13, Raman Amplification optical fiber 14 and the WDM couplers 15 as output section.
Multiple incoherent light sources 11 export the incoherent light IL with wavelength different from each other respectively.In addition, so-called non-phase Dry light, the lasing light emitter not vibrated with single or multiple discrete pattern (longitudinal mode), but mean that there is continuous frequency spectrum The light that the set of photon without correlation is formed.Multiple incoherent light sources 11 include SLD (Super Luminescent Diode： Super-radiance light emitting diode), SOA (Semiconductor Optical Amplifier：Semiconductor optical amplifier) and possess ASE (the Amplified Spontaneous Emission of terres rares addition optical fiber (such as EDF)：Amplified spontaneous emission source) Light source it is at least one, in present embodiment 1, if all SLD.
Multiple excitation light sources 12 difference output wavelengths are mutually different and with to incoherent light IL progress Raman amplifictions The second order excitation light SPL of wavelength.Multiple excitation light sources 12 include mutually different Fabry-Perot (FP) type of wavelength, by FP types At least the one of the semiconductor laser of the FP-FBG types, DFB types and the DBR types that are combined with Fiber Bragg Grating FBG (FBG) It is individual, in present embodiment 1, if all FP types semiconductor lasers.
Each incoherent light IL and each second order excitation light SPL is carried out multiplex to export by WDM couplers 13.Fig. 2 is to represent WDM The figure of one of the structure of coupler 13.WDM couplers 13 have following structure, i.e. are made up of dielectric multilayer film filter Multiple WDM couplers 13a and multiple WDM couplers 13b for being made up of dielectric multilayer film filter connected by optical fiber Connection.Each WDM couplers 13a is connected by optical fiber with each incoherent light source 11, and with to from the incoherent light source connected The incoherent light IL of 11 outputs is reflected and makes the light transmissive wavelength characteristic of other wavelength.Similarly, each WDM couplers 13b is connected by optical fiber with each excitation light source 12, and with the second order excitation light SPL to being exported from the excitation light source 12 connected Reflected and make the light transmissive wavelength characteristic of other wavelength.Thus, WDM couplers 13 can by each incoherent light IL and Each second order excitation light SPL carries out multiplex and exported from output port 13c.
Fig. 3 is the figure of the WDM couplers 13 ' of another of the structure for being denoted as WDM couplers.WDM couplers 13 ' have Standby AWG (the Arrayed Waveguide Gratings for having used planar lightwave circuit (PLC)：Array waveguide grating) 13 ' a. Each of multiple aa of port 13 ' of AWG13 ' a multiport side is connected with each incoherent light source 11, multiple ab's of port 13 ' Each is connected with each excitation light source 12.Thus, WDM couplers 13 ' can be by each incoherent light IL and each second order excitation light SPL Carry out multiplex and exported from the ac of output port 13 '.
It is back to Fig. 1.Raman amplifiction via WDM couplers 13 and multiple incoherent light sources 11 and multiple is swashed with optical fiber 14 Encourage light source 12 to connect, pass through each second order excitation light SPL inputted and Raman amplifiction is carried out to each incoherent light IL inputted, and Exported as incoherent amplification light.Raman amplifiction optical fiber 14 is optical fiber known to highly nonlinear optical fiber etc..It is here, multiple non- Coherent source 11 and multiple excitation light sources 12 are connected via WDM couplers 13 with Raman amplifiction optical fiber 14 so that each second order Excitation light SPL carries out preceding to excitation to each incoherent light IL.That is, in Raman amplifiction each second order excitation light SPL in optical fiber 14 The direction of propagation and each incoherent light IL direction of propagation are same directions.
WDM couplers 15 as output section are connected with optical delivery fiber 1002, are transfused to incoherent amplification light, and by its It is set to the single order excitation light FPL with the wavelength that Raman amplifiction is carried out to flashlight S1 and is output to optical delivery fiber 1002.WDM Coupler 15 is the known WDM couplers for having used dielectric multilayer film filter etc..Here, WDM couplers 15 pass with light The connection of fibre 1002 is lost make it that it is preceding to excitation that single order excitation light FPL is carried out to flashlight S1.That is, WDM couplers 15 pass with light Lose fibre 1002 to connect so that the single order excitation light FPL direction of propagation turns into same direction with the flashlight S1 direction of propagation.By This, the flashlight S1 transmitted in optical delivery fiber 1002 by the stimulated Raman scattering phenomenon in optical delivery fiber 1002, from And Raman amplifiction is carried out by single order excitation light FPL.
If known using incoherent light as single order excitation light, the RIN from single order excitation light to flashlight can be reduced Transfer, but because the power output of incoherent light source is typically small, so being difficult to swash directly as the single order of Raman amplifiction Light source is encouraged to use.
On the other hand, present inventors have discovered that, encouraged by the relevant second order by FP type semiconductor lasers etc. Light carry out Raman amplifiction after incoherent light as single order excitation light in the case of, can also reduce to flashlight RIN shift. Then, in Raman amplification system 100, it is configured in Raman amplifiction light source 10, will be made up of FP type semiconductor lasers Multiple excitation light sources 12 as second order excitation light SPL by Raman amplifiction to carry out Raman amplifiction with optical fiber 14 incoherent to obtain Light, resulting incoherent light is subjected to Raman to flashlight S1 by optical delivery fiber 1002 as single order excitation light FPL and put Greatly.Thereby, it is possible to realize low RIN transfers.
In addition, incoherent light IL, compared with the coherent sources such as FP type semiconductor lasers, luminous wave band is wider, relative to Peak strength is relatively low for luminous overall intensity.Therefore, it is used as single order excitation light FPL by being amplified to it, from And low SBS can be realized.And then the width of the luminous wave band according to incoherent light IL, as representational nonlinear effect Four-wave mixing be difficult to meet its phase-matching condition, the generation of four-wave mixing is inhibited.Thereby, it is possible to realize low nonlinearity Effect.
It is additionally, since the multiple incoherent light sources for possessing incoherent light IL of the output with wavelength different from each other respectively 11 and second order excitation light SPL of the output with wavelength different from each other multiple excitation light sources 12 respectively, therefore can be in wideband The gain amplifier of the wavelength region control signal light of band carries out light amplification.
So, by Raman amplifiction light source 10,4 above-mentioned problems can be solved simultaneously.
, can be according to being amplified in addition, excitation light source 12 and wavelength, quantity, frequency band, the power of incoherent light source 11 Flashlight S1 amplification band, desired gain and gain flatness are suitably adjusted.
Next, the example of the configuration and power to incoherent light and the wavelength of second order excitation light illustrates.Fig. 4 is Represent the figure of one of the configuration of incoherent light and the wavelength of second order excitation light.In the example shown in Figure 4, if incoherent light The quantity in source 11 (SLD) is 2, and the quantity of excitation light source 12 (excitation FP-LD) is 4.As shown in figure 4, by second order excitation light SPLA, SPLB, SPLC, SPLD wavelength are set to 1350nm, 1370nm, 1380nm, 1400nm, and power is set to 250mW.In addition, Incoherent light ILA, ILB wavelength are set to 1450nm, 1480nm, three dB bandwidth is set to 30nm, and power is all provided with For 5mW.In the position for the long wavelength side that Raman shift about 100nm is distinguished from second order excitation light SPLA, SPLB, SPLC, SPLD Put, form the Raman gain frequency band using Raman peak values RPA, RPB, RPC, RPD based on each second order excitation light as peak.By This, incoherent light ILA, ILB turn into single order excitation light FPL by Raman amplifiction.Here, in the example shown in Figure 4, because setting Second order excitation light SPLA, SPLB, SPLC, SPLD wavelength has been determined to cause Raman peak values RPA, RPB, RPC, RPD positioned at relative For incoherent light ILA, ILB peak wavelength the luminous intensity of the relatively low wavelength of the luminous intensity of long wavelength side and short wavelength side compared with Low wavelength, so the light for being capable of the relatively low wavelength of the luminous intensity to incoherent light ILA, ILB gives higher Raman gain.Knot Fruit, single order excitation light FPL turn into more flat spectral shape relative to wavelength.
For example, in embodiment 1, second order excitation light SPLA, SPLB, SPLC, SPLD, non-is being set as described above In the case of coherent light ILA, ILB, the wide band incoherent drawing of high power and 1430nm~1500nm degree can be obtained Graceful amplification light (single order excitation light), can be to the letter of the C+L wave bands used in optical communications of the degree from 1530nm to 1625nm Number light carries out Raman amplifiction.
In addition, in multiple incoherent light sources 11, as long as by by SLD and ASE light sources, SOA and ASE light based on EDF Different types of incoherent light source that source, SOA and SLD etc. export the incoherent light of wave band different from each other is combined, so as to Make excitation light band broadband, then the broadband of gain frequency band becomes easy.Such as use using 1480nm wave bands in In the case that the SOA that tens of nm of heart wave band is acted is as incoherent light source, it is difficult to make the SOA in ripple in addition Acted under length.Therefore, if the SOA and SLD, ASE light source are used simultaneously, just 1480nm wave bands can also not make to swash Encourage optical band and be extended to 1300nm wave bands or 1550nm wave bands.In addition, by using the ASE light source conducts for having used following optical fiber ASE light sources, so as to make excitation light band broadband, the optical fiber is to added with different rare earth element (Er or Er With Al2O3, being co-doped with of Yb, PbS semiconductor-quantum-point) optical fiber connected optical fiber, be added with different rare earths jointly The optical fiber of element.
(embodiment 2)
Fig. 5 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 2 Figure.Raman amplification system 100A is made up of Raman amplifiction light source 10A and optical delivery fiber 1002.
Raman amplifiction light source 10A possesses：Multiple incoherent light sources 11, it is multiple excitation light source 12, WDM couplers 13Aa, 13Ab, Raman amplifiction optical fiber 14 and WDM couplers 15.
Each incoherent light IL is carried out multiplex and exported by WDM couplers 13Aa.WDM couplers 13Ab is by each second order excitation light SPL carries out multiplex and exported.WDM couplers 13Aa, 13Ab can use Fig. 2, the dielectric multilayer film filter illustrated in 3, AWG is formed.
Raman amplifiction optical fiber 14 is connected via WDM couplers 13Aa with multiple incoherent light sources 11, and is coupled via WDM Device 13Ab is connected with multiple excitation light sources 12.Raman amplifiction passes through each second order excitation light SPL inputted with optical fiber 14 come to institute Each incoherent light IL of input carries out Raman amplifiction, and is exported as incoherent amplification light.Here, multiple incoherent light sources 11 And multiple excitation light sources 12 connect via WDM couplers 13Aa, 13Ab and Raman amplifiction optical fiber 14 respectively so that each second order Excitation light SPL is encouraged backward to each incoherent light IL.That is, in Raman amplifiction with optical fiber 14, each second order excitation light SPL's The direction of propagation and each incoherent light IL direction of propagation are opposite direction.
WDM couplers 15 are connected with optical delivery fiber 1002, are transfused to incoherent amplification light, and are set to have to letter Number light S1 carries out the single order excitation light FPL of the wavelength of Raman amplifiction and is output to optical delivery fiber 1002.Here, WDM couplers 15 are connected with optical delivery fiber 1002 so that single order excitation light FPL carries out preceding to excitation to flashlight S1.Thus, flashlight S1 By single order excitation light FPL and by Raman amplifiction in optical delivery fiber 1002.
According to Raman amplifiction light source 10A, can also be solved simultaneously above-mentioned with the same manner as light source 10 with Raman amplifiction 4 problems.And then in the Raman amplifiction with light source 10A, in Raman amplifiction with optical fiber 14, each second order excitation light SPL passes through Backward excitation carries out Raman amplifiction to each incoherent light IL.Thus, each second order excitation light SPL turns to each incoherent light IL RIN Shifting is further reduced, so the RIN transfers to flashlight S1 are also further reduced.
(embodiment 3)
Fig. 6 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 3 Figure.Raman amplification system 100B is made up of Raman amplifiction light source 10B and optical delivery fiber 1002.
Raman amplifiction light source 10B has is replaced into WDM couplers by the WDM couplers 15 of Raman amplifiction light source 10 15B structure.WDM couplers 15B is connected with optical delivery fiber 1002, is transfused to incoherent amplification light, and be set to have The single order excitation light FPL of the wavelength of Raman amplifiction is carried out to flashlight S1 and is output to optical delivery fiber 1002.Here, WDM couplings Clutch 15B is connected with optical delivery fiber 1002 so that single order excitation light FPL is encouraged backward to flashlight S1.That is, WDM couplings Clutch 15B is connected with optical delivery fiber 1002 so that the single order excitation light FPL direction of propagation and the flashlight S1 direction of propagation into For opposite direction.Thus, flashlight S1 in optical delivery fiber 1002 by single order excitation light FPL and by Raman amplifiction.
According to Raman amplifiction light source 10B, can also be solved simultaneously above-mentioned with the same manner as light source 10 with Raman amplifiction 4 problems.In addition, in the case where Raman amplifiction is with light source 10B, with Raman amplifiction forward direction stimulable type as light source 10 Situation is compared, and can further suppress low nonlinear effects.This is to depend on, due to being backward stimulable type, so flashlight S1 Start the transmission loss by optical delivery fiber 1002 so as to which power starts after diminishing by drawing based on single order excitation light FPL It is graceful amplification and be exaggerated, therefore flashlight S1 power be kept as in optical delivery fiber 1002 it is smaller to stimulable type than preceding, also, Because single order excitation light FPL and flashlight S1 backpropagations, it is difficult to satisfaction compared with forward direction encourages and causes nonlinear effect Phase-matching condition.
(embodiment 4)
Fig. 7 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 4 Figure.Raman amplification system 100C is made up of Raman amplifiction light source 10C and optical delivery fiber 1002.
Raman amplifiction light source 10C has is replaced into WDM couplers by Raman amplifiction light source 10A WDM couplers 15 15C structure.WDM couplers 15C is connected with optical delivery fiber 1002, is transfused to incoherent amplification light, and be set to have The single order excitation light FPL of the wavelength of Raman amplifiction is carried out to flashlight S1 and is output to optical delivery fiber 1002.Here, WDM couplings Clutch 15C is connected with optical delivery fiber 1002 so that single order excitation light FPL is encouraged backward to flashlight S1.That is, WDM couplings Clutch 15C is connected with optical delivery fiber 1002 so that the single order excitation light FPL direction of propagation and the flashlight S1 direction of propagation into For opposite direction.Thus, flashlight S1 in optical delivery fiber 1002 by single order excitation light FPL and by Raman amplifiction.
According to Raman amplifiction light source 10C, can also be solved simultaneously above-mentioned with the same manner as light source 10 with Raman amplifiction 4 problems.And then in the Raman amplifiction with light source 10C, with Raman amplifiction with the same manner as light source 10A, used up in Raman amplifiction In fibre 14, each second order excitation light SPL carries out Raman amplifiction by encouraging backward to each incoherent light IL.Thus, each second order excitation RIN transfers of the light SPL to each incoherent light IL is further reduced, so the RIN transfers to flashlight S1 also further obtain To reduction.
(embodiment 5)
Fig. 8 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 5 Figure.Raman amplification system 100D is made up of Raman amplifiction light-source system 10D and optical delivery fiber 1002.
Raman amplifiction light-source system 10D possesses Raman amplifiction light source 10 and Raman amplifiction light source 10B, Raman amplifiction Connected with light source 10,10B WDM couplers 15,15B and optical delivery fiber 1002 so that must be respectively from WDM couplers 15,15B The single order excitation light FPL of output carries out two-way excitation to flashlight S1.That is, Raman amplification system 100D is to have used Raman amplifiction With light-source system 10D two-way excitation system.
According to Raman amplifiction light-source system 10D, can also solve 4 above-mentioned problems simultaneously.And then according to Raman Light-source system 10D is used in amplification, due to being two-way stimulable type, so being also easy to wavelength flattened, the broadband for reaching Raman gain Change, NF it is wavelength flattened.
Alternatively, it is also possible to form Raman amplifiction light source with light source 10C with light source 10A and Raman amplifiction by Raman amplifiction System, Raman amplifiction is connected to optical delivery fiber 1002 to cause from respective with light source 10A, 10C WDM couplers 15,15C The single order excitation light FPL of output carries out two-way excitation to flashlight S1, forms same with Raman amplification system 100D two-way sharp Encourage Raman amplification system.
(embodiment 6)
Fig. 9 is the schematic structure for the Raman amplification system for having used the Raman amplifiction light source involved by embodiment 6 Figure.Raman amplification system 100E is made up of Raman amplifiction light source 10E and optical delivery fiber 1002.
Raman amplifiction light source 10E possesses：Multiple incoherent light sources 11, multiple excitation light sources 12 and as output section WDM couplers 13.
WDM couplers 13 are connected with multiple incoherent light sources 11, multiple excitation light sources 12 and optical delivery fiber 1002, will Each incoherent light IL from the input of each incoherent light source 11 and each second order excitation light SPL outputs from each excitation light source 12 input To be propagated in the same direction in optical delivery fiber 1002.And then WDM couplers 13 are connected with optical delivery fiber 1002 to cause Each incoherent light IL and each second order excitation light SPL is propagated in optical delivery fiber 1002 along with flashlight S1 identicals direction. Such structure can be by being connected to optical delivery fiber 1002 with from input port by the WDM couplers 13 shown in Fig. 2 13d input signal lights S1 is simultaneously exported to realize from output port 13c.In addition, in the feelings using the WDM couplers 13 ' shown in Fig. 3 Under condition, the ad of port 13 ' of the photosynthetic ripple of setting signal, and optical delivery fiber 1002 is connected to input from the ad of port 13 ' Flashlight S1 simultaneously comes from the ac of output port 13 ' by flashlight S1 and each incoherent light IL and each second order excitation light SPL progress multiplex Output.
In Raman amplification system 100E, in optical delivery fiber 1002, each incoherent light IL is by each second order excitation light SPL slowly carries out Raman amplifiction, single order excitation light FPL of the generation with the wavelength that Raman amplifiction is carried out to flashlight S1.Single order Excitation light FPL is propagated along with flashlight S1 identicals direction, and Raman amplifiction is carried out to flashlight S1.That is, Raman amplification system 100E is preceding to stimulable type and the Raman amplification system of second order stimulable type.
According to Raman amplifiction light source 10E, can also solve 4 above-mentioned problems simultaneously.And then put according to the Raman Light source 10E is used greatly, although being put due to carrying out Raman to flashlight S1 in the optical delivery fiber 1002 near WDM couplers 13 Big single order excitation light FPL power is smaller, thus flashlight S1 Raman gain is smaller, but as flashlight S1 is in light biography Lose in fibre 1002 and be transmitted, incoherent light IL is exaggerated by second order excitation light SPL, so as to single order excitation light FPL's Power becomes big, becomes big for flashlight S1 Raman gain.Thus, if, transmitting as optical delivery fiber 1002 on the whole Loss and Raman gain eliminate well, and the transmission loss so as to regard as just as optical fiber is 0 or optical delivery fiber 1002 The equable transmission path of the power of flashlight S1 on length direction, can further reduce nonlinear effect.
In addition, with Raman amplification system 100E structure, as illustrated in Figure 4, by second order excitation light SPLA, SPLB, SPLC, SPLD wavelength are set to 1350nm, 1370nm, 1380nm, 1400nm, and power is set to 250mW, will be non- Coherent light ILA, ILB wavelength are set to 1450nm, 1480nm, and three dB bandwidth is set into 30nm, and power is set into 5mW, Come the experiment for carrying out Raman amplifiction.Flashlight S1 is set to the WDM signal light being made up of 4 flashlights, and its wavelength is set to 1530nm、1560nm、1590nm、1620nm.In addition, the length of optical delivery fiber 1002 is set to 50km.As a result, in each signal The wavelength of light has obtained about 10dB Raman gain.In addition, maximum Raman gain and minimum in the wavelength of 4 flashlights The difference of Raman gain be below 1dB.
In addition, according to Raman amplifiction light source 10E, Raman amplification system the 100E wavelength for passing through second order excitation light SPL Setting, can not only be acted, additionally it is possible to the excitation system as three rank excitation systems or higher order as second order excitation system System is acted.If for example, using (a) 1380nm ± 20nm as second order excitation light SPL wavelength, and it is used as incoherent Light source 11 and use (b) 1480nm ± 20nm SLD, then acted as following second order excitation Raman amplification system, That is, Raman amplifiction is carried out to (b) by (a), flashlights of (b) after the amplification to the wavelength region before and after 1590nm ± 20nm S1 carries out Raman amplifiction.
If in addition, for example use (a) 1290nm ± 20nm and (a ') 1380nm as second order excitation light SPL wavelength ± 20nm, and use (b) 1480nm ± 20nm SLD as incoherent light source 11, then encourage and draw as three following ranks Graceful amplification system and acted, i.e. by (a) to (a ') carry out Raman amplifiction, it is (a ') and right by (a ') after the amplification (b) Raman amplifiction is carried out, (b) after the Raman amplifiction is drawn the flashlight S1 of the wavelength region before and after 1590nm ± 20nm Graceful amplification.In this case, Raman amplifiction light source 10E possesses the excitation light source for exporting following excitation light, the excitation light tool There is the wavelength that the second order excitation light SPL exported at least one in multiple excitation light sources 12 carries out Raman amplifiction.Now, if (a), (a '), the power of (b) are adjusted, then can reach above-mentioned 4 problems simultaneously, and be also easy to reach the flat of Raman gain Change, broadband, NF planarization.
(embodiment 7)
Figure 10 be used the Raman amplifiction light-source system involved by embodiment 7 Raman amplification system it is schematic Structure chart.Raman amplification system 100F is made up of Raman amplifiction light-source system 10F and optical delivery fiber 1002.
Raman amplifiction light-source system 10F possesses Raman amplifiction light source 10E and Raman amplifiction light source 10EA.Raman is put There is following structure with light source 10EA greatly, i.e. in Raman amplifiction with light source 10E, WDM couplers 13 are connected to optical transport light Fibre 1002 so that from output port 13c input signal light S1, and exported from input port 13d.In optical delivery fiber 1002 In, Raman amplifiction is slowly carried out by each second order excitation light SPL from Raman amplifiction with each incoherent light IL that light source 10EA is inputted, it is raw Into the single order excitation light FPL with the wavelength that Raman amplifiction is carried out to flashlight S1.Single order excitation light FPL edges and flashlight S1 phases Anti- direction is propagated, and Raman amplifiction is carried out to flashlight S1.On the other hand, swashed by the Raman amplifiction light source 10E single orders generated Encourage light FPL to propagate along with flashlight S1 identicals direction, Raman amplifiction is carried out to flashlight S1.
So, each Raman amplifiction light source 10E, 10EA WDM couplers 13 are connected to optical delivery fiber 1002 so that one Rank excitation light FPL carries out two-way excitation to flashlight S1, has used Raman amplifiction to use up so as to which Raman amplification system 100F turns into Source system 10F two-way stimulable type and the Raman amplification system of second order stimulable type.
According to Raman amplifiction light-source system 10F, can also solve 4 above-mentioned problems simultaneously, and put with Raman The big situation with light source 10E similarly, can further reduce nonlinear effect, it is two-way stimulable type to be additionally, since, therefore energy Enough improve the free degree of the design of the distribution of the power of the flashlight S1 on the length direction of optical delivery fiber 1002.It is for example, logical The wavelength of each excitation light source 12 and incoherent light source 11 in crossing Raman amplifiction light source 10E, 10EA each, quantity, frequency band, Power, in addition to amplification band, desired gain and the gain flatness that can adjust the flashlight S1 to be amplified, also The distribution of the power of the flashlight S1 on length direction can be adjusted.And then according to Raman amplifiction light-source system 10F, Raman Amplification system 100F can not only be acted in the same manner as Raman amplification system 100E as second order excitation system, additionally it is possible to Excitation system as three rank excitation systems or higher order is acted.
(embodiment 8)
Figure 11 be used the Raman amplifiction light-source system involved by embodiment 8 Raman amplification system it is schematic Structure chart.Raman amplification system 100H is made up of Raman amplifiction light-source system 10H and optical delivery fiber 1002.
Raman amplifiction light-source system 10H possesses the 1st light source portion 10HA and the 2nd light source portion 10HB.1st light source portion 10HA has It is standby：Export incoherent light IL more than the 1st individual incoherent light source 11A；With with more than the 1st individual incoherent light source 11A and optical transport light Fibre 1002 is connected, and incoherent light IL is output to the 1st output section i.e. WDM couplers 16 of optical delivery fiber 1002.2nd light source portion 10HB possesses：Second order excitation light SPL of the output with the wavelength that Raman amplifiction is carried out to incoherent light IL more than the 1st individual excitation lights Source 12A；It is connected with more than the 1st excitation light source 12A and optical delivery fiber 1002, second order excitation light SPL is output into light passes Lose the 2nd output section i.e. WDM couplers 17 of fibre 1002.
For individual incoherent light source 11A more than 1st in the same manner as multiple incoherent light sources 11, output respectively has ripple different from each other Long incoherent light IL.Individual incoherent light source 11A more than 1st includes SLD, SOA and possesses the ASE light sources of terres rares addition optical fiber It is at least one, in present embodiment 8, if all SLD.From the incoherent light IL of each incoherent light source 11A outputs work( Rate is, for example, 40mW.
For more than 1st excitation light source 12A in the same manner as multiple excitation light sources 12, output wavelength is mutually different respectively and has The second order excitation light SPL of the wavelength of Raman amplifiction is carried out to incoherent light IL.It is mutual that more than 1st excitation light source 12A includes wavelength Different FP types, the semiconductor laser of the FP-FBG types, DFB types and the DBR types that combine FP types and FBG are at least One, in present embodiment 8, if all FP types semiconductor lasers.From the second order excitation light of each excitation light source 12A outputs SPL power is, for example, 500mW.
WDM couplers 16 and WDM couplers 17 are connected with optical delivery fiber 1002 so that incoherent light IL and second order excitation Light SPL is propagated in opposite direction between WDM couplers 16 and WDM couplers 17 in optical delivery fiber 1002.Thus, Specifically, incoherent light IL propagates along with flashlight S1 identicals direction, and second order excitation light SPL edges are opposite with flashlight S1 Propagate in direction.
In the Raman amplifiction with light-source system 10H, the optical transport light between WDM couplers 16 and WDM couplers 17 In fibre 1002, the incoherent light IL inputted slowly carries out Raman amplifiction by second order excitation light SPL, and generation has to flashlight S1 Carry out the single order excitation light FPL of the wavelength of Raman amplifiction.Single order excitation light FPL propagates along with flashlight S1 identicals direction, right Flashlight S1 carries out Raman amplifiction.That is, Raman amplification system 100H is preceding to stimulable type and the Raman amplifiction of second order stimulable type System.
According to Raman amplifiction light-source system 10H, can also solve 4 above-mentioned problems simultaneously.And then according to the drawing Light-source system 10H is used in graceful amplification, by with the Raman amplifiction same effects of light source 10E, if whole as optical delivery fiber 1002 From the point of view of body, then transmission loss and Raman gain eliminate well, and the transmission loss so as to regard as just as optical fiber passes for 0 or light The equable transmission path of the power of the flashlight S1 on the length direction of fibre 1002 is lost, can further be reduced non-linear Effect.And then according in the same manner as Raman amplifiction light-source system 10H, Raman amplification system 100H and Raman amplification system 100E, It can not only be acted as second order excitation system, additionally it is possible to carried out as the excitation system of three rank excitation systems or higher order Action.
(embodiment 9)
Figure 12 be used the Raman amplifiction light-source system involved by embodiment 9 Raman amplification system it is schematic Structure chart.Raman amplification system 100I is made up of Raman amplifiction light-source system 10I and optical delivery fiber 1002.
With Raman amplifiction with the same manner as light-source system 10H, Raman amplifiction light-source system 10I also possesses the 1st light source portion 10HA and the 2nd light source portion 10HB.In addition, following also identical with light-source system 10H with Raman amplifiction on this point, i.e. WDM couplings Clutch 16 and WDM couplers 17 are connected with optical delivery fiber 1002 so that incoherent light IL and second order excitation light SPL are in WDM couplings Propagated in opposite direction in optical delivery fiber 1002 between clutch 16 and WDM couplers 17.But with Raman amplifiction light source System 10H is different, and WDM couplers 16 and WDM couplers 17 are connected with optical delivery fiber 1002 so that incoherent light IL edges and letter Direction opposite number light S1 is propagated, second order excitation light SPL along and flashlight S1 identicals direction propagate.
In the Raman amplifiction with light-source system 10I, with Raman amplifiction with the same manner as light-source system 10H situation, in WDM In optical delivery fiber 1002 between coupler 16 and WDM couplers 17, the incoherent light IL inputted is by second order excitation light SPL Slowly carry out Raman amplifiction, single order excitation light FPL of the generation with the wavelength that Raman amplifiction is carried out to flashlight S1.But with Raman amplifiction is different with light-source system 10H situation, and single order excitation light FPL propagates along the direction opposite with flashlight S1, to letter Number light S1 carries out Raman amplifiction.That is, Raman amplification system 100I is the Raman amplifiction system of backward stimulable type and second order stimulable type System.
According to Raman amplifiction light-source system 10I, can also solve 4 above-mentioned problems simultaneously.And then according to Raman Amplification is used in the same manner as light-source system 10I, Raman amplification system 100I and Raman amplification system 100E, can not only be swashed as second order The system of encouraging is acted, additionally it is possible to which the excitation system as three rank excitation systems or higher order is acted.
(embodiment 10)
Figure 13 is the signal for the Raman amplification system for having used the Raman amplifiction light-source system involved by embodiment 10 Property structure chart.Raman amplification system 100J is made up of Raman amplifiction light-source system 10J and optical delivery fiber 1002.
Raman amplifiction light-source system 10J possesses the 1st light source portion 10HAA and the 2nd light source portion 10HBA.1st light source portion 10HAA possesses：Export incoherent light IL more than the 1st individual incoherent light source 11A；Export more than the 2nd of the 2nd second order excitation light SPL2 Encourage light source 12B；It is connected with more than the 1st individual incoherent light source 11A, more than the 2nd excitation light source 12B and optical delivery fiber 1002, Incoherent light IL and the 2nd second order excitation light SPL2 are output to the 1st output section i.e. WDM couplers of optical delivery fiber 1002 16A.2nd light source portion 10HBA possesses：Export second order excitation light SPL more than the 1st excitation light source 12A；Export the 2nd incoherent light Individual incoherent light source 11B more than the 2nd of IL2；Passed with more than the 1st excitation light source 12A, more than the 2nd individual incoherent light source 11B and light Lose fibre 1002 to connect, the 2nd incoherent light IL2 and second order excitation light SPL are output to the 2nd output of optical delivery fiber 1002 Portion is WDM couplers 17A.
Individual incoherent light source 11B outputs encourage with the 2nd second order exported by more than the 2nd excitation light source 12B more than 2nd Light SPL2 carries out the 2nd incoherent light IL2 of the wavelength of Raman amplifiction.More than 1st excitation light source 12A outputs have to more than the 1st The incoherent light IL that individual incoherent light source 11A is exported carries out the second order excitation light SPL of the wavelength of Raman amplifiction.
WDM couplers 16A and WDM coupler 17A is connected with optical delivery fiber 1002 so that incoherent light IL and second order swash Light SPL is encouraged to propagate in opposite direction in optical delivery fiber 1002 between WDM coupler 16A and WDM couplers 17A, also, 2nd incoherent light IL2 and the 2nd second order excitation light SPL2 is between WDM coupler 16A and WDM couplers 17A in optical delivery fiber Propagated in opposite direction in 1002.Thus, specifically, incoherent light IL and the 2nd second order excitation light SPL2 edges and flashlight S1 identicals direction is propagated, and second order excitation light SPL and the 2nd incoherent light IL2 propagate along the direction opposite with flashlight S1.
In the Raman amplifiction with light-source system 10J, the optical transport between WDM coupler 16A and WDM couplers 17A In optical fiber 1002, the incoherent light IL inputted slowly carries out Raman amplifiction by second order excitation light SPL, and generation has to flashlight S1 carries out the single order excitation light FPL of the wavelength of Raman amplifiction.And then in the Raman amplifiction with light-source system 10J, in WDM couplings In optical delivery fiber 1002 between clutch 16A and WDM coupler 17A, the 2nd incoherent light IL2 inputted is swashed by the 2nd second order Encourage light SPL2 and slowly carry out Raman amplifiction, 2nd single order excitation light of the generation with the wavelength that Raman amplifiction is carried out to flashlight S1 FPL2.Single order excitation light FPL propagates along with flashlight S1 identicals direction, the 2nd single order excitation light FPL2 edges and flashlight S1 phases Anti- direction is propagated, and carries out Raman amplifiction to flashlight S1 respectively.That is, Raman amplification system 100J is two-way stimulable type and two The Raman amplification system of rank stimulable type.
According to Raman amplifiction light-source system 10J, can also solve 4 above-mentioned problems simultaneously.And then according to the drawing Light-source system 10J is used in graceful amplification, due to being two-way stimulable type, therefore can be improved on the length direction of optical delivery fiber 1002 The free degree of the design of the distribution of flashlight S1 power.For example, by light source portion 10HAA, 10HBA each in each excitation light Source 12A, 12B and the wavelength of incoherent light source 11A, 11B, quantity, frequency band, power, except the signal to be amplified can be adjusted Outside light S1 amplification band, desired gain and gain flatness, additionally it is possible to adjust the flashlight S1 on length direction Power distribution.And then in Raman amplification system 100J, Raman amplifiction is carried out to the incoherent light IL inputted from front Second order excitation light is not limited to the second order excitation light SPL imported from rear, can also be encouraged by the 2nd second order inputted from front Light SPL2 carries out Raman amplifiction to the incoherent light IL inputted from front.Which which incoherent light is entered as second order excitation light Row Raman amplifiction, the design dependent on system.And then according to Raman amplifiction light-source system 10J, Raman amplification system 100J with Raman amplification system 100E similarly, can not only be acted as second order excitation system, additionally it is possible to encourage system as three ranks The excitation system of system or higher order is acted.
In addition, in the above-described embodiment, multiple incoherent light source 11,11A or 11B can also be included as in Figure 14 (a) shown in, the multistage connections of SOA11a is formed and export incoherent light IL or IL2 incoherent light source 11C, can also be wrapped Containing shown in (b) in such as Figure 14, including SLD11b and SOA11a and it is configured to non-to being exported from SLD11b by SOA11a Coherent light carries out light amplification and exports the incoherent light source 11D for incoherent light IL or IL2.Thereby, it is possible to increase incoherent light IL or IL2 power.
In addition, the present invention is not limited to above-mentioned embodiment.By above-mentioned each inscape it is appropriately combined and form Structure is also included in the present invention.In addition, further effect, variation can easily be derived by those skilled in the art Go out.Therefore, wider mode of the invention is not limited to above-mentioned embodiment, can carry out various changes.
Industrial applicibility
As described above, Raman amplifiction light source involved in the present invention, Raman amplifiction light-source system, raman amplifier with And Raman amplification system is useful in fiber optic communication.
Symbol description
10th, 10A, 10B, 10C, 10E, 10EA Raman amplifiction light source
10D, 10F, 10H, 10I, 10J Raman amplifiction light-source system
The light source portion of 10HA, 10HAA the 1st
The light source portion of 10HB, 10HBA the 2nd
11st, 11A, 11B, 11C, 11D incoherent light source
12nd, 12A, 12B encourage light source
13rd, 13 ', 13a, 13b, 13Aa, 13Ab, 15,15B, 15C, 16,16A, 17,17A WDM couplers
13′a AWG
13c, 13 ' ac output ports
13d input ports
13 ' aa, 13 ' ab, 13 ' ad ports
14 Raman amplifiction optical fiber
100th, 100A, 100B, 100C, 100D, 100E, 100F, 100H, 100I, 100J Raman amplification system
1000 optical transmission systems
1001 transmitters
1002 optical delivery fibers
1003 receivers
FPL single order excitation lights
The single order excitation lights of FPL2 the 2nd
IL, ILA, ILB incoherent light
The incoherent lights of IL2 the 2nd
RPA, RPB, RPC, RPD Raman peak values
S1 flashlights
SPL, SPLA second order excitation light
The second order excitation lights of SPL2 the 2nd.

Claims (23)

1. a kind of Raman amplifiction light source, for by the stimulated Raman scattering phenomenon in optical delivery fiber in the optical transport light The flashlight transmitted in fibre carries out Raman amplifiction, and the Raman amplifiction light source is characterised by possessing：
Multiple incoherent light sources, export incoherent light；
Multiple excitation light sources, second order excitation light of the output with the wavelength that Raman amplifiction is carried out to the incoherent light；
Raman amplifiction optical fiber, it is connected with the multiple incoherent light source and the multiple excitation light source, passes through what is inputted The second order excitation light carries out Raman amplifiction to the incoherent light inputted and exported；With
Output section, it is connected, is transfused to after carrying out Raman amplifiction with optical fiber by the Raman amplifiction with the optical delivery fiber Incoherent amplification light, and the incoherent amplification light is set to the single order with the wavelength that Raman amplifiction is carried out to the flashlight Excitation light and be output to the optical delivery fiber.
2. Raman amplifiction light source according to claim 1, it is characterised in that
The multiple incoherent light source and the multiple excitation light source are connected with the Raman amplifiction with optical fiber so that described two Rank excitation light carries out preceding to excitation to the incoherent light.
3. Raman amplifiction light source according to claim 1, it is characterised in that
The multiple incoherent light source and the multiple excitation light source are connected with the Raman amplifiction with optical fiber so that described two Rank excitation light is encouraged backward to the incoherent light.
4. Raman amplifiction light source according to any one of claim 1 to 3, it is characterised in that
The output section is connected with the optical delivery fiber so that the single order excitation light carries out preceding to sharp to the flashlight Encourage.
5. Raman amplifiction light source according to any one of claim 1 to 3, it is characterised in that
The output section is connected with the optical delivery fiber so that the single order excitation light is swashed backward to the flashlight Encourage.
A kind of 6. Raman amplifiction light source, for being carried out by optical delivery fiber to the flashlight transmitted in the optical delivery fiber Raman amplifiction, the Raman amplifiction light source are characterised by possessing：
Multiple incoherent light sources, export incoherent light；
Multiple excitation light sources, second order excitation light of the output with the wavelength that Raman amplifiction is carried out to the incoherent light；With
Output section, it is connected with the multiple incoherent light source, the multiple excitation light source and the optical delivery fiber, and by institute The incoherent light and the second order excitation light of input carry out output and caused in the optical delivery fiber in the same direction Propagate,
In the optical delivery fiber, pass through the second order excitation light inputted and the incoherent light inputted is drawn Graceful amplification, single order excitation light of the generation with the wavelength that Raman amplifiction is carried out to the flashlight.
7. Raman amplifiction light source according to claim 6, it is characterised in that
Possess：Light source is encouraged, output has enters at least one exported second order excitation light in the multiple excitation light source The excitation light of the wavelength of row Raman amplifiction.
8. Raman amplifiction light source according to any one of claim 1 to 7, it is characterised in that
The multiple incoherent light source includes super-radiance light emitting diode, semiconductor optical amplifier and possesses terres rares addition light Fine amplified spontaneous emission source it is at least one.
9. Raman amplifiction light source according to any one of claim 1 to 8, it is characterised in that
The multiple incoherent light source include with super-radiance light emitting diode and semiconductor optical amplifier and be configured to by Semiconductor optical amplifier carries out light amplification and the incoherent light source exported to the incoherent light exported from super-radiance light emitting diode.
10. Raman amplifiction light source according to any one of claim 1 to 9, it is characterised in that
The multiple incoherent light source includes the incoherent light source for forming the multistage connection of semiconductor optical amplifier.
11. Raman amplifiction light source according to any one of claim 1 to 10, it is characterised in that
The multiple excitation light source includes Fabry-Perot type, combines Fabry-Perot type and Fiber Bragg Grating FBG Fabry-Perot-Fiber Bragg Grating FBG type, distributed feedback and DBR type semiconductor laser It is at least one.
12. the Raman amplifiction light source according to any one of claim 1 to 11, it is characterised in that
The multiple incoherent light source includes the incoherent light source for the incoherent light for exporting mutually different wave band.
A kind of 13. Raman amplifiction light-source system, it is characterised in that
Possess the Raman amplifiction light source described in Raman amplifiction light source and the claim 5 described in claim 4, each drawing The output section of graceful amplification light source is connected with the optical delivery fiber so that the single order excitation light carries out double to the flashlight To excitation.
A kind of 14. Raman amplifiction light-source system, it is characterised in that
Possess the Raman amplifiction light source described in two claims 6, the output section of each Raman amplifiction light source with it is described Optical delivery fiber connects so that the single order excitation light carries out two-way excitation to the flashlight.
15. a kind of Raman amplifiction light-source system, for by optical delivery fiber to the signal that is transmitted in the optical delivery fiber Light carries out Raman amplifiction, and the Raman amplifiction light-source system is characterised by possessing：
1st light source portion, possesses：Export incoherent light more than the 1st individual incoherent light sources and with individual incoherent light source more than the described 1st And the optical delivery fiber connects and the incoherent light is output to the 1st output section of the optical delivery fiber；And
2nd light source portion, possesses：The 1st of second order excitation light of the output with the wavelength that Raman amplifiction is carried out to the incoherent light Multiple excitation light sources and it is connected with more than the described 1st excitation light sources and the optical delivery fiber and by the second order excitation light The 2nd output section of the optical delivery fiber is output to,
1st output section and the 2nd output section are connected with the optical delivery fiber so that the incoherent light and described two Rank excitation light is passed in opposite direction between the 1st output section and the 2nd output section in the optical delivery fiber Broadcast,
In the optical delivery fiber between the 1st output section and the 2nd output section, pass through the second order inputted Excitation light carries out Raman amplifiction to the incoherent light inputted, and generation is with the ripple that Raman amplifiction is carried out to the flashlight Long single order excitation light.
16. Raman amplifiction light-source system according to claim 15, it is characterised in that
The 2nd light source portion possesses more than the 2nd individual incoherent light sources of the 2nd incoherent light of output, and the 2nd incoherent light, which has, to be passed through The second order excitation light carries out the wavelength of Raman amplifiction,
The 1st light source portion possesses more than the 2nd excitation light sources of the 2nd second order excitation light of output, and the 2nd second order excitation light has pair 2nd incoherent light carries out the wavelength of Raman amplifiction,
2nd output section in the 2nd light source portion is connected with individual incoherent light source more than the described 2nd, and the 2nd incoherent light is exported To the optical delivery fiber,
1st output section in the 1st light source portion is connected with more than the described 2nd excitation light sources, and the 2nd second order is encouraged into light output To the optical delivery fiber,
1st output section and the 2nd output section are connected with the optical delivery fiber so that the 2nd incoherent light and institute State the 2nd second order excitation light between the 1st output section and the 2nd output section in the optical delivery fiber in opposite direction Propagated,
In the optical delivery fiber between the 1st output section and the 2nd output section, pass through the described 2nd inputted Second order excitation light carries out Raman amplifiction to the 2nd incoherent light inputted, and generation has carries out Raman to the flashlight 2nd single order excitation light of the wavelength of amplification.
17. the Raman amplifiction light-source system according to any one of claim 13 to 16, it is characterised in that
The multiple incoherent light source includes super-radiance light emitting diode, semiconductor optical amplifier and possesses terres rares addition light Fine amplified spontaneous emission source it is at least one.
18. the Raman amplifiction light-source system according to any one of claim 13 to 17, it is characterised in that
The multiple incoherent light source include with super-radiance light emitting diode and semiconductor optical amplifier and be configured to by Semiconductor optical amplifier carries out light amplification and the incoherent light source exported to the incoherent light exported from super-radiance light emitting diode.
19. the Raman amplifiction light-source system according to any one of claim 13 to 18, it is characterised in that
The multiple incoherent light source includes the incoherent light source for forming the multistage connection of semiconductor optical amplifier.
20. the Raman amplifiction light-source system according to any one of claim 13 to 19, it is characterised in that
The multiple excitation light source includes the mutually different Fabry-Perot type of wavelength, by Fabry-Perot type and optical fiber Bradley The Fabry-Perot that lattice grating combination forms-Fiber Bragg Grating FBG type, distributed feedback and DBR type Semiconductor laser it is at least one.
21. the Raman amplifiction light-source system according to any one of claim 13 to 20, it is characterised in that
The multiple incoherent light source includes the incoherent light source for the incoherent light for exporting mutually different wave band.
22. a kind of raman amplifier, it is characterised in that possess：
The drawing any one of Raman amplifiction light source or claim 13 to 21 any one of claim 1 to 12 Graceful amplification light-source system；With
The optical delivery fiber.
23. a kind of Raman amplification system, it is characterised in that possess：
The drawing any one of Raman amplifiction light source or claim 13 to 21 any one of claim 1 to 12 Graceful amplification light-source system；With
The optical delivery fiber.
CN201680022816.1A 2015-05-13 2016-05-13 Raman amplification light source, Raman amplification light source system, Raman amplifier, and Raman amplification system Active CN107533270B (en)

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JP2015-210487 2015-10-27
PCT/JP2016/064337 WO2016182068A1 (en) 2015-05-13 2016-05-13 Light source for raman amplification, light source system for raman amplification, raman amplifier, raman amplifying system

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