宽带铋基掺铒光纤放大器的增益箝制研究  

Study of gain-clamped characteristics for broadband bismuth-based erbium-doped fiber amplifier

作　　者：周亚训[1] 王森[1] 陈芬[1] 杨高波[1] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《红外与激光工程》2011年第3期520-524,共5页Infrared and Laser Engineering

基　　金：浙江省自然科学基金资助项目(Y107070);宁波市自然科学基金资助项目(2010A610172);宁波"新型光电功能材料及器件"创新团队项目(2009B21007);宁波大学胡岚优秀博士基金项目

摘　　要：应用于动态通信网络中的光放大器需要恒定的信号增益。为此,设计了一个基于环形激光腔结构的宽带铋基掺铒光纤放大器(Bi-EDFA),进行了宽带Bi-EDFA信号增益箝制特性的理论研究。结果表明:通过将放大器输出的一个前向放大自发辐射(ASE)噪声光反馈到输入端,可以实现对1.53μm波段传输信号的增益箝制。环路损耗越小,放大器的输出增益越小,但实现增益箝制的信号输入功率动态范围越大。同时,在多路CWDM信号传输情形下,可以在下载一些信道的同时,很好地保持剩余信道的增益稳定。研究结果对于新型宽带Bi-EDFA的实际应用具有理论指导意义。A constant signal gain is required for the optical amplifier applied in the dynamic communication network.A new kind of broadband bismuth-based erbium-doped fiber amplifier（Bi-EDFA） with a ring laser cavity structure was designed,and the gain-clamped characteristics of Bi-EDFA were investigated theoretically.The studies show that the 1.53 μm band signal gain can be clamped by directing one of the forward amplified spontaneous emission（ASE） lights at the output end of Bi-EDFA back to the input end.The lower the loop loss is,the smaller the output gain of Bi-EDFA is,but the larger the signal input power dynamic range can be allowed for gain clamping is.Meanwhile,the remaining channel gains can be clamped well when some of channels are dropped in the multi-channel CWDM signal transmission case.The results are of theoretical significance for the practical applications of new broadband Bi-EDFA.

关 键 词：增益箝制 铋基掺铒光纤放大器 信号增益 数值模拟 

分 类 号：TN929.11[电子电信—通信与信息系统]