超长距离通信系统中远程泵浦的优化设计  

Optimization design of remote pumping in ultra-long-haul communication systems

作　　者：蒋群[1,2] 夏晓舟[1,3] 章青[1] 

机构地区：[1]河海大学工程力学系,江苏南京210098 [2]江西科技师范学院通信电子学院,江西南昌330013 [3]广东工业大学建设学院,广东广州510006

出　　处：《光通信研究》2010年第1期57-59,共3页Study on Optical Communications

基　　金：国家自然科学基金重点资助项目(50679022)

摘　　要：文章介绍了一种用于密集波分复用(DWDM)超长距离通信系统中远程泵浦的传输设计方案。为了得到较大的增益与较小的噪声指数,我们选择了数值孔径小、掺杂浓度低的掺铒光纤,同时光路中还采用了对信号光全透、对泵浦光全反的二色镜来提高泵浦光的利用率。通过优化的光路设计,我们得到了增益>17 dB、噪声指数<7 dB的远程泵浦放大器。This paper introduces a transmission design scheme for the remote pumping in DWDM ultra-long-haul communication systems. In order to obtain high gain and low noise figure, we adopt Er-doped fibers, which are characteristic of small numerical aperture and low doping concentration, and use a dichroscope that reflect all pumping light and transmits all signal light to increase the utilization ratio of the pumped light. Thanks to the optimized lightpath design, we obtain a remote pumping amplifier with a gain of 〉17 dB and noise figure of 〈7 dB.

关 键 词：远程泵浦系统 掺铒光纤 噪声指数 泵浦放大器 

分 类 号：TN722.7[电子电信—电路与系统]