碲基掺铒光纤放大器增益均衡的数值模拟  

Numerical simulations on gain equalization of erbium-doped tellurite-based optical fiber amplifier

作　　者：姜程[1] 聂秋华[1] 徐铁峰[1] 周亚训[1] 李浩泉[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：《量子电子学报》2006年第4期542-546,共5页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(60272034)浙江省自然科学基金(601011)宁波科技局重点博士基金(02J20101-01)资助项目

摘　　要：针对宽带碲基掺铒光纤放大器(EDTFA)本征增益谱不平坦特性,研究了采用双级串连结构,并在两段光纤中间加入增益均衡滤波器来实现增益平坦。模拟结果显示,通过设计一定结构的滤波谱,在37信道同时输入的情况下,铒离子掺杂浓度为4000 ppm时,使1536-1608 nm范围带宽内的增益达到了24 dB左右,噪声指数小于5．5 dB,增益谱的不平坦度小于1 dB;铒离子掺杂浓度为6000 ppm时,使1536-1608 nm范围带宽内的增益达到了23．5 dB左右。噪声指数小于5 dB,增益谱的不平坦度小于1dB。优化后的级连EDTFA可以满足WDM系统的要求。As we know, the intrinsic gain spectrum characteristics of broadband tellurite-based fiber amplifier （EDTFA） is not flat, so we designed a kind of dual-stage structure with a gain equalization filter between fibers. The theoretical simulation result shows that the fiber with 4000 ppm Er^3＋ concentration achieved a gain of 24 dB and noise figure of 5.5 dB with a slight gain excursion of 1 dB and the fiber with 6000 ppm Er^3＋ concentration also achieved a gain of 24 dB and noise figure of 5 dB with a slight gain excursion of ldB over a wide wavelength range of 1536-1608 nm through designing certain filters. The dual-stage EDTFA can meet the demand of WDM system after optimization.

关 键 词：光通信 增益均衡 数值模拟 碲基掺铒光纤放大器 

分 类 号：TN929.11[电子电信—通信与信息系统]