基于拉曼组合放大的长距离光纤传输系统  

Long-distance optical fiber transmission system based on hybrid Raman amplification

作　　者：饶云江[1,2] 李立[1] 贾新鸿[1] 冉曾令[1] 张田虎[1] 

机构地区：[1]电子科技大学宽带光纤传输和通信网技术教育部重点实验室,成都610054 [2]重庆大学光电技术与系统教育部重点实验室,重庆400044

出　　处：《物理学报》2010年第7期4682-4686,共5页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2007AA01Z245)资助的课题~~

摘　　要：本文改进了一种实现长距离自适应补偿光纤传输的方法.在利用光纤光栅形成的谐振腔产生激光对信号光进行拉曼放大的基础上,再利用双抽运光对信号光进行拉曼放大,从而获得更高的拉曼增益以实现更长距离的自适应补偿光纤传输.使实验自适应补偿传输距离达125km(为目前国际上已报道的最长自适应补偿光纤传输距离).实验测量并理论分析了该长距离光纤传输系统的开关增益、放大的自发辐射噪声、噪声指数和光功率分布的特性,实验结果与理论模型符合很好.A novel modified method for realizing long-distance self-adaptive compensation optical fiber transmission is proposed.Based on the hybrid Raman amplification achieved by combining the original bi-directional Raman pump with a second Raman amplification generated by a fiber laser formed by a fiber Bragg grating pair with high reflectivity,the signal light is amplified effectively and the longest self-adaptive compensation optical fiber transmission distance of 125 km is achieved in experiment for the first time,to the best of our knowledge.In addition,the ON /OFF gain,amplified spontaneous emission noise,noise figure and the signal power distribution characteristics of the system are studied experimentally and theoretically.The experimental results are in good agreement with the theoretical analysis.

关 键 词：光纤通信系统 自适应补偿光纤传输 受激拉曼放大 光纤激光器 

分 类 号：TN929.11[电子电信—通信与信息系统]