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Method and system for suppressing relative phase noise in coherent optical fiber Raman amplification system

A technology of Raman amplification and relative phase, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve the problems of affecting transmission distance, low signal-to-noise ratio, and large relative phase noise, so as to increase transmission distance and reduce noise The effect of the coefficient

Active Publication Date: 2020-12-01
国网新疆电力有限公司信息通信公司 +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and system for suppressing relative phase noise in a coherent optical fiber Raman amplification system, which overcomes the deficiencies of the prior art and can effectively solve the problem of signal noise caused by large relative phase noise in a coherent optical fiber Raman amplification system. The ratio is low, which affects the transmission distance

Method used

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  • Method and system for suppressing relative phase noise in coherent optical fiber Raman amplification system
  • Method and system for suppressing relative phase noise in coherent optical fiber Raman amplification system
  • Method and system for suppressing relative phase noise in coherent optical fiber Raman amplification system

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Embodiment 1

[0040] Embodiment 1: as attached figure 1 , 2 As shown, the suppression method of relative phase noise in this coherent fiber Raman amplification system comprises the following steps:

[0041] Step 1: The forward Raman pump module emits forward Raman pump light, the beam splitter receives and splits the forward Raman pump light, and 99% of the forward Raman pump light is input into the transmitting end to combine Beamer, then enter the second step, input 1% of the forward Raman pump light into the optical power meter, then enter the third step;

[0042] Step 2: The beam combiner at the transmitting end couples 99% of the forward Raman pump light, and the coupled forward Raman pump light enters the transmission fiber, and then enters the sixth step;

[0043] Step 3: The optical power meter receives 1% of the forward Raman pump light, and monitors the power of the 1% forward Raman pump light in real time, so as to obtain the power of the other 99% of the forward Raman pump lig...

Embodiment 2

[0062] Embodiment 2: as attached figure 1 , 2 As shown, the relative phase noise suppression system in the coherent optical fiber Raman amplification system includes a forward Raman pump module, a beam splitter, a signal transmitter, an optical power meter, a feedback algorithm module, a beam combiner at the transmitting end, and a transmission Optical fiber, backward Raman pumping optical module, beam combiner and signal receiver at the receiving end;

[0063] Signal transmitter: used to emit optical signals carrying transmission data;

[0064] Forward Raman pump module: used to emit forward Raman pump light;

[0065] Beam splitter: used to split the forward Raman pump light, 99% of the forward Raman pump light is used for injection into the transmission fiber, and 1% of the forward Raman pump light is used for power monitoring.

[0066] Optical power meter: used to monitor the power fluctuation of 1% of the forward Raman pump light output by the beam splitter;

[0067] F...

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Abstract

The invention relates to the technical field of the optical fiber communication, and is a suppression method and system of relative phase noise in a coherent optical fiber Raman amplification system.The method comprises the following steps: step one, a beam splitter receives forward Raman pumping light and performs the light splitting; step two, a transmitting end beam combiner couples 99% of forward Raman pumping light; step three, an optical power meter monitors the power of the 1% of forward Raman pumping light in real time; step four, an optimal value of the optical power is determined through a feedback algorithm; step five, a fiber incident power of the transmitted signal light is regulated; step six, the forward Raman pumping light amplifies the signal light entering the transmission optical fiber; and step seven, a signal receiver receives the signal light. By improving the commercial transmitting end and the forward pumping structure at present, the forward Raman pumping light performs light splitting through one beam splitter, the fiber incident power of the signal light is regulated in real time, the compensation part reduces the noise coefficient of the Raman amplifierdue to the receiving end signal light relative phase noise caused by the forward pumping light power fluctuation.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, and relates to a method and system for suppressing relative phase noise in a coherent optical fiber Raman amplification system. Background technique [0002] With the development of optical fiber communication technology, the distance and transmission rate of optical fiber transmission systems requiring single-span non-electrical relay are getting longer and higher, especially the high-order modulation coherent optical fiber communication systems above 100G. In this case, the use of bidirectional distributed Raman amplifiers is an effective way to extend the fiber transmission span; especially in ultra-long-span fiber systems, distributed Raman amplifiers and more advanced high-order modulation formats must be used to achieve Realize the requirements for fiber spans in application scenarios. [0003] In the forward pumping distributed Raman amplification, the pump light will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/291H04B10/293H04B10/079H04B10/69
CPCH04B10/07955H04B10/2916H04B10/293H04B10/693H04B10/697
Inventor 崔力民周文婷王鑫张玮李亚平张志军谢鹏王晓磊宋广磊刘杰张振杰马斌
Owner 国网新疆电力有限公司信息通信公司
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