L波段EDFA特性研究及优化设计  

Characteristics of L-band EDFA and its optimization design

作　　者：费海峰[1] 余震虹[1] 纪长军[1] 

机构地区：[1]江南大学通信与控制工程学院通信研究所,江苏无锡214122

出　　处：《量子电子学报》2008年第1期94-98,共5页Chinese Journal of Quantum Electronics

摘　　要：基于Giles模型对C-EDFA放大的自发辐射谱进行了研究,得出了铒纤增益随长度增加向长波段位移的结论。分析了L-EDFA和C-EDFA中各光束的传输特性,为L-EDFA低泵浦转换效率提供了合理的解释,并研究了L-EDFA本征平坦增益特性,确定了形成平坦增益的最佳粒子数反转条件(-40%)。最后利用EDFA前端加入一个光纤环行镜反射后向ASE光这种新颖的结构,较好地解决了L-EDFA泵浦效率低的问题,相比于传统的链路结构泵浦转换效率提高了8.76%。EDF gain shifting to long band with the length increase was demonstrated by analyzing the C-EDFA amplified spontaneous emmission spectrum based on Giles model. Furthermore, transmission characteristic of various beam of light in L-EDFA and C-EDFA was studied and a reasonable explanation for low pump conversion efficiency （PCE） of L-EDFA was provided. Moreover, the intrinsic flat gain property was investigated. Gain spectrum is flat on optimum population inversion level （-40%）. Finally, the problem of L-EDFA low PCE was solved by using a fiber loop mirror at the foreside of the L-EDFA to reflect the backward ASE. The PCE increases by 8.76% compared with the conventional structure.

关 键 词：光通信 泵浦转换效率 GILES模型 L波段掺铒光纤放大器 放大的自发辐射 优化设计 

分 类 号：TN252[电子电信—物理电子学]