双包层Er^(3+)/Yb^(3+)共掺光纤放大器粒子数特性分析

Numerical analysis of the population distribution characteristics in Er^(3+)/Yb^(3+) co-doped double-clad fiber amplifiers

基于速率方程和光传输方程 ,对双包层Er3 + /Yb3 + 共掺光纤放大器的计算模型进行了讨论 ,并利用数值模拟结果对 980nm激光抽运双包层Er3 + /Yb3 + 共掺光纤放大器Er3 + 上能级粒子数的分布特性进行了分析。分别给出了正向抽运和反向抽运条件下 ,Er3 + 归一化上能级粒子数分布曲线。

Based on the rate equations and light propagation equations,the model of Er 3+/Yb 3+ co-doped double clad fiber amplifiers has been discussed,and the population distribution characteristics of Er 3+ upper level in Er 3+/Yb 3+ co-doped double clad fiber amplifier pumped at 980nm bands have been analyzed by using the results of numerical simulation.The normalized population distribution curves of Er 3+ upper level have been obtained under two different pump schemes,namely co- and counter-propagations. The distribution characteristic of signal has also been analyzed by using the normalized population distribution curves of Er 3+ upper level.