CN105258920A - Detection method of transmission fiber joint loss of Raman fiber amplifier - Google Patents
Detection method of transmission fiber joint loss of Raman fiber amplifier Download PDFInfo
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- CN105258920A CN105258920A CN201510551765.9A CN201510551765A CN105258920A CN 105258920 A CN105258920 A CN 105258920A CN 201510551765 A CN201510551765 A CN 201510551765A CN 105258920 A CN105258920 A CN 105258920A
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Abstract
The invention provides a detection method of a transmission fiber joint loss of a Raman fiber amplifier. A pumping power monitoring unit and an out-of-band ASE detection unit are arranged. The pumping power monitoring unit connected to a central control processor includes a power detector; the power detector is connected to a power coupler by WDM; and the out-of-band ASE detection unit includes an ASE band detector connected to the central control processor. The detection method includes: step one, setting an initial pumping light power as P1; step two, detecting an out-of-band ASE detection unit power value Pasel; step three, setting a pumping light power as P2; step four, detecting an out-of-band ASE power value Pase 2; and step five, carrying out program automatic convergence calculation to obtain a loss of a joint of a Raman fiber amplifier and a transmission fiber. During actual work, measurement of the loss of the joint of the Raman fiber amplifier and the transmission fiber has nothing to do with a signal light power in an operating bandwidth. Moreover, on the basis of calculation with the method, the fiber joint loss is irrelevant to the attenuation coefficient of the transmission fiber and thus the consistency is good.
Description
Technical field
The present invention relates to a kind of Raman Fiber Amplifier, especially about the detection method of a kind of Raman Fiber Amplifier Transmission Fibers splicing loss.
Background technology
Stimulated Raman scattering (SRS) is a kind of non-linear phenomena in optical fiber, and sub-fraction incident optical power is transferred on the frequency stokes wave lower than it by it; If a weak signal and a heavy pumping light wave transmit in a fiber simultaneously, and make weak signal wavelength be placed in the Raman gain bandwidth of pump light, weak signal light just can be amplified, and namely this image intensifer based on stimulated Raman scattering mechanism is called fiber Raman amplifier (FRA).
For distributed Raman fiber amplifier, generally amplify luminous power by the spontaneous radiation in certain section of wavelength outside calibration gain and signal bandwidth of operation and carry out ride gain.If there is larger splicing loss between Transmission Fibers and Raman Fiber Amplifier, the calibration relation between spontaneous radiation luminous power and gain will be had influence on, thus cause larger gain error, therefore need accurately to measure the splicing loss between Raman Fiber Amplifier and Transmission Fibers.
Set forth a kind of mathematical relation utilized between the outer spontaneous radiation amplification luminous power of band and pumping light power in patent CN102749783, and determined that the mathematical relation determination splicing loss value between luminous power is amplified in splicing loss and the outer spontaneous radiation of band.But, the limitation of this method is, relevant with the loss of Transmission Fibers by the opticalfiber splicing loss calculated, instead of there is certain differential loss between the optical fiber of same batch, which results in the opticalfiber splicing loss calculated and there is certain error.
Summary of the invention
For avoiding fibre loss difference to cause opticalfiber splicing loss error, the invention provides the detection method of a kind of Raman Fiber Amplifier Transmission Fibers splicing loss.
In order to reach foregoing invention object, technical scheme provided by the invention is as follows: the detection method of a kind of Raman Fiber Amplifier Transmission Fibers splicing loss, and its structure comprises pump power monitoring means and the outer ASE probe unit of band; Wherein, pump power monitoring means is connected to central control processor, and comprises a power detector, and this power detector is connected to power coupler by WDM; Be with outer ASE probe unit to comprise ASE and be with detector, and ASE is with detector to be connected to central control processor, its step comprises:
The first step: setting initial pump luminous power is P1;
Second step: the outer ASE performance number Pase1 of surveying tape;
3rd step: setting pumping light power is P2;
4th step: the outer ASE performance number Pase2 of surveying tape;
5th step: program restrains the splicing loss calculating Raman Fiber Amplifier and Transmission Fibers automatically.
Wherein, preferred implementation is: to multi-pumping Raman fiber amplifier, pumping light power is set to the power sum of short wavelength's pump power or multiple pump light, and the performance number of the isolated part pump light of power detector probe power coupling mechanism of pump power monitoring means is also sent to central control processor.
Wherein, preferred implementation is: be with outer ASE probe unit to utilize power coupler and wave filter to be detached by the ASE light outside part signal bandwidth, and the ASE optical transport detached is with detector to ASE, ASE is with detector that this performance number is sent to central control processor, calculates the ASE performance number within the scope of the band money in real system.
The detection method of a kind of Raman Fiber Amplifier Transmission Fibers of the present invention splicing loss has the following advantages and good effect compared to prior art: in real work, and the splicing loss of measuring Raman Fiber Amplifier and Transmission Fibers is irrelevant with the signal light power in bandwidth of operation; And the attenuation coefficient being calculated opticalfiber splicing loss and Transmission Fibers by the method is had nothing to do, and consistance is better.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that pump mode RFA is applied to communication system.
Fig. 2 is the functional module structure schematic diagram of Raman Fiber Amplifier of the present invention.
Fig. 3 is the schematic flow sheet of the detection method of Raman Fiber Amplifier Transmission Fibers of the present invention splicing loss.
Embodiment
For making there is further understanding to object of the present invention, structural attitude and function thereof, accompanying drawing is coordinated to be described in detail as follows.Should be appreciated that the specific embodiment described by this part only in order to explain the present invention, can be not intended to limit the present invention.
As shown in Figure 1, to adopt the distributed Raman fiber amplifier (RFA) of backward pump mode, in figure, the initial power of pumping 10 light of RFA is set to P1; That forward transmits is flashlight S1; Wherein, flashlight S1 distally launches, and the Transmission Fibers 110 through long-distance transfers to RFA input end I1, exports through RFA output terminal O1.Wherein, the input end I1 of RFA is the input end of flashlight S1, is also the output terminal of RFA pump light P1 simultaneously.
Referring to the laser functional module 500 that Fig. 2, Fig. 2 are in Raman Fiber Amplifier of the present invention, this functional module 500 comprises pump power monitoring means 510 and the outer ASE probe unit 530 of band.Wherein, pump power monitoring means 510 is connected to central control processor, and it comprises a power detector, and this power detector is connected to the power coupler of RFA by the WDM of RFA100.Wherein, be with outer ASE probe unit 530 to comprise ASE and be with detector, and ASE is with detector to be connected to central control processor.
Please refer to Fig. 3, the detection method of Raman Fiber Amplifier Transmission Fibers of the present invention splicing loss (ConnectorLoss), comprises the following steps:
First, setting initial pump 10 luminous power is P1, and unit is mW; To multi-pumping Raman fiber amplifier, P1 is set to the power sum of short wavelength's pump power or multiple pump light, and the power detector of pump power monitoring means 510 detects the performance number of the isolated part pump light of power coupler of RFA and is sent to central control processor;
Secondly, the outer ASE performance number Pase1 of surveying tape, unit is dBm; Outer ASE probe unit 530 is with to utilize power coupler and wave filter to be detached by the ASE light outside part signal bandwidth, and the ASE optical transport detached is with detector to ASE, ASE is with detector detect the outer ASE performance number Pase1 of band and be sent to central control processor;
Again, setting pumping 10 luminous power is P2, and unit is mW; To multi-pumping Raman fiber amplifier, P2 is set to the power sum of short wavelength's pump power or multiple pump light, and the power detector of pump power monitoring means 510 detects the performance number of the isolated part pump light of power coupler of RFA and is sent to central control processor;
Then, the outer ASE performance number Pase2 of surveying tape, unit is dBm; Outer ASE probe unit 530 is with to utilize power coupler and wave filter to be detached by the ASE light outside part signal bandwidth, and the ASE optical transport detached is with detector to ASE, ASE is with detector detect the outer ASE performance number Pase1 of band and be sent to central control processor;
Finally, by calculating the splicing loss LossCon of Raman Fiber Amplifier and Transmission Fibers; Its computing method are explained as follows in detail:
Raman Fiber Amplifier spontaneous radiation ASE item in main optical path is 2h* ν * Δ ν * gR*Pp, wherein h is Planck constant, and ν is spontaneous radiation light frequency, and Δ ν is the Raman frequency shift of spontaneous radiation relative to pump light, gR is Raman gain coefficienct, and Pp is pumping light power.
If the linear switch gain that G (ratio) is raman amplifier, as G (ratio) >>1, can obtain after a series of being similar to is done to ASE power:
Pase(dBm)＝10*log10(G(ratio)-1)+a(1)
Wherein Pase (dB) is ASE power, and unit is dBm; A is one and optical fiber effective length, the parameter that Raman gain coefficienct is relevant, itself and pump power, and fiber attenuation coefficient has nothing to do;
And following formula is existed to G (ratio):
G(ratio)＝exp(gR*Pp*Leff/Aeff)(2)
Wherein gR is Raman gain coefficienct, and Pp is pumping light power, and unit is mW; Leff is the effective length of optical fiber, and Aeff is the useful area of optical fiber.If the unit of G is dB, so gain G (dB) and pump power Pp (mW) then linear
If Pase (mW)=10^ (Pase (dBm)/10), unit is mW, according to (1) formula, passable by calibrating
Obtain G (ratio)=ga1*Pase (mW)+ga2+1 (3)
Wherein ga1, ga2 are the calibration coefficient irrelevant with fibre loss.
First pump power is set to P1 (mW), measures and be now with outer ASE power P ase1 (dBm), corresponding linear switch gain is G1 (ratio); Pump power is set to P2 (mW) subsequently, there is P2>P1, generally getting P2 is about the twice of P1, and record the outer ASE power P ase2 (dBm) of band now, corresponding linear switch gain is G2 (ratio).
By formula (2) Shi Ke get
10*log(G1(ratio))*P2/P1-10*log(G2(ratio))＝0(4)
If the splicing loss of Raman Fiber Amplifier and Transmission Fibers is LossCon, unit is dB, can convert as follows to the Pase (mW) before opticalfiber splicing loss
Pase(mW)＝10^((Pase(dBm)+LossCon)/10)(5)
Formula (5) formula substitutes into formula (3) and can obtain
G(ratio)＝ga1*10^((Pase(dBm)+LossCon)/10)+ga2+1(6)
Formula (6) formula substitutes into formula (4) and can obtain
10*log(ga1*10^((Pase1(dBm)+LossCon)/10)+ga2+1)*P2/P1-10*log(ga1*10^((Pase2(dBm)+LossCon)/10)+ga2+1)＝Error(7)
Error is error, asks LossCon to make Error=0 by process of iteration
Converging factor ke is set, makes
LossCon＝LossCon+Error*ke；
Program will restrain the splicing loss LossCon calculating Raman Fiber Amplifier and Transmission Fibers automatically.
The detection method of a kind of Raman Fiber Amplifier Transmission Fibers of the present invention splicing loss has the following advantages and good effect compared to prior art: in real work, and the splicing loss of measuring Raman Fiber Amplifier and Transmission Fibers is irrelevant with the signal light power in bandwidth of operation; And the attenuation coefficient being calculated opticalfiber splicing loss and Transmission Fibers by the method is had nothing to do, and consistance is better.
The above, be only preferred embodiment, and not for limiting the scope of the invention, all equivalences done according to the present patent application the scope of the claims change or modify, and are all the present invention and contain.
Claims (3)
1. a detection method for Raman Fiber Amplifier Transmission Fibers splicing loss, its structure comprises pump power monitoring means and the outer ASE probe unit of band; Wherein, pump power monitoring means is connected to central control processor, and comprises a power detector, and this power detector is connected to power coupler by WDM; Be with outer ASE probe unit to comprise ASE and be with detector, and ASE is with detector to be connected to central control processor, its step comprises:
The first step: setting initial pump luminous power is P1;
Second step: the outer ASE performance number Pase1 of surveying tape;
3rd step: setting pumping light power is P2;
4th step: the outer ASE performance number Pase2 of surveying tape;
5th step: program restrains the splicing loss calculating Raman Fiber Amplifier and Transmission Fibers automatically.
2. the detection method of a kind of Raman Fiber Amplifier Transmission Fibers as claimed in claim 1 splicing loss, it is characterized in that: to multi-pumping Raman fiber amplifier, pumping light power is set to the power sum of short wavelength's pump power or multiple pump light, and the performance number of the isolated part pump light of power detector probe power coupling mechanism of pump power monitoring means is also sent to central control processor.
3. the detection method of a kind of Raman Fiber Amplifier Transmission Fibers as claimed in claim 1 splicing loss, it is characterized in that: be with outer ASE probe unit to utilize power coupler and wave filter to be detached by the ASE light outside part signal bandwidth, and the ASE optical transport detached is with detector to ASE, ASE is with detector detect the outer ASE performance number Pase1 of band and be sent to central control processor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328559A (en) * | 2017-08-14 | 2017-11-07 | 桂林聚联科技有限公司 | A kind of loss of fibre-optical connection measurement apparatus and measuring method |
| CN108604930A (en) * | 2016-02-19 | 2018-09-28 | 三菱电机株式会社 | Encourage light supply apparatus and optical transmission system |
| CN108768510A (en) * | 2018-06-27 | 2018-11-06 | 武汉光迅科技股份有限公司 | The equivalent 0km splicing losses acquisition methods of Fiber Node and device in a kind of Raman Fiber Amplifier |
| CN108833003A (en) * | 2018-06-27 | 2018-11-16 | 武汉光迅科技股份有限公司 | The equivalent 0km splicing loss acquisition methods of fiber attenuation coefficient and device in a kind of Raman Fiber Amplifier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010050807A1 (en) * | 2000-06-13 | 2001-12-13 | Hiroyuki Deguchi | Method, device, and system for evaluating characteristics of optical fiber transmission line |
| CN102749783A (en) * | 2012-07-09 | 2012-10-24 | 武汉光迅科技股份有限公司 | Raman optical fiber amplifier and detection method of loss of transmission optical fiber connector of Raman optical fiber amplifier |
| CN104104428A (en) * | 2013-04-15 | 2014-10-15 | 昂纳信息技术（深圳）有限公司 | Laser safety protection device and method applied to distributed Raman fiber amplifier |
| CN104242036A (en) * | 2014-10-11 | 2014-12-24 | 无锡市中兴光电子技术有限公司 | Raman fiber amplifier and automatic gain control method thereof |
-
2015
- 2015-09-01 CN CN201510551765.9A patent/CN105258920B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010050807A1 (en) * | 2000-06-13 | 2001-12-13 | Hiroyuki Deguchi | Method, device, and system for evaluating characteristics of optical fiber transmission line |
| CN102749783A (en) * | 2012-07-09 | 2012-10-24 | 武汉光迅科技股份有限公司 | Raman optical fiber amplifier and detection method of loss of transmission optical fiber connector of Raman optical fiber amplifier |
| CN104104428A (en) * | 2013-04-15 | 2014-10-15 | 昂纳信息技术（深圳）有限公司 | Laser safety protection device and method applied to distributed Raman fiber amplifier |
| CN104242036A (en) * | 2014-10-11 | 2014-12-24 | 无锡市中兴光电子技术有限公司 | Raman fiber amplifier and automatic gain control method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108604930A (en) * | 2016-02-19 | 2018-09-28 | 三菱电机株式会社 | Encourage light supply apparatus and optical transmission system |
| CN107328559A (en) * | 2017-08-14 | 2017-11-07 | 桂林聚联科技有限公司 | A kind of loss of fibre-optical connection measurement apparatus and measuring method |
| CN107328559B (en) * | 2017-08-14 | 2023-03-21 | 桂林聚联科技有限公司 | Optical fiber connection loss measuring device and measuring method |
| CN108768510A (en) * | 2018-06-27 | 2018-11-06 | 武汉光迅科技股份有限公司 | The equivalent 0km splicing losses acquisition methods of Fiber Node and device in a kind of Raman Fiber Amplifier |
| CN108833003A (en) * | 2018-06-27 | 2018-11-16 | 武汉光迅科技股份有限公司 | The equivalent 0km splicing loss acquisition methods of fiber attenuation coefficient and device in a kind of Raman Fiber Amplifier |
| CN108833003B (en) * | 2018-06-27 | 2021-01-08 | 武汉光迅科技股份有限公司 | Method and device for acquiring equivalent 0km joint loss of optical fiber attenuation coefficient in Raman optical fiber amplifier |
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Address after: 518000 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee after: Ona Technology (Shenzhen) Group Co.,Ltd. Address before: 518118 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee before: O-NET COMMUNICATIONS (SHENZHEN) Ltd. |