中国物理B ›› 2004, Vol. 13 ›› Issue (9): 1460-1463.doi: 10.1088/1009-1963/13/9/017

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Theoretical analysis on double Rayleigh backscattering noise in optical fibre Raman amplifiers and its suppression

姜文宁, 陈建平, 李新碗, 尚韬   

  1. State Key Laboratory on Fibre-Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiaotong University, Shanghai 200030, China
  • 收稿日期:2003-12-20 修回日期:2004-05-09 出版日期:2005-06-21 发布日期:2005-06-21
  • 基金资助:
    Project partially supported by the National Natural Science Foundation of China (Grant Nos 90204006 and 60377013), the National High Technology Development Program of China (Grant Nos 2001AA122074 and 2002AA122022), the Ministry of Education, China and th

Theoretical analysis on double Rayleigh backscattering noise in optical fibre Raman amplifiers and its suppression

Jiang Wen-Ning (姜文宁), Chen Jian-Ping (陈建平), Li Xin-Wan (李新碗), Shang Tao (尚韬)   

  1. State Key Laboratory on Fibre-Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiaotong University, Shanghai 200030, China
  • Received:2003-12-20 Revised:2004-05-09 Online:2005-06-21 Published:2005-06-21
  • Supported by:
    Project partially supported by the National Natural Science Foundation of China (Grant Nos 90204006 and 60377013), the National High Technology Development Program of China (Grant Nos 2001AA122074 and 2002AA122022), the Ministry of Education, China and th

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摘要： In this paper, amplified double Rayleigh backscattering noise (DRB) in the optical fibre Raman amplifier is analysed. Expressions are presented for both forward pumping and backward pumping schemes. Calculation is performed to show the effective suppression of DRB noise by employing an optical isolator. The optimal position for the isolator is determined and is found to be insensitive to the power levels of the signals and pumps. The results show that a reduction of the DRB noise by almost 2 to 3 orders can be reached.

Abstract: In this paper, amplified double Rayleigh backscattering noise (DRB) in the optical fibre Raman amplifier is analysed. Expressions are presented for both forward pumping and backward pumping schemes. Calculation is performed to show the effective suppression of DRB noise by employing an optical isolator. The optimal position for the isolator is determined and is found to be insensitive to the power levels of the signals and pumps. The results show that a reduction of the DRB noise by almost 2 to 3 orders can be reached.

Key words: optical fibre Raman amplifier, double Rayleigh backscattering

中图分类号:  (Stimulated Brillouin and Rayleigh scattering)

  • 42.65.Es
42.55.Wd (Fiber lasers)