Numerical analysis of the population distribution characteristics in Er3+/Yb3+ co-doped double-clad fiber amplifiers
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摘要: 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。利用上能级粒子数沿光纤的分布曲线解释了信号光沿光纤的分布规律。Abstract: Based on the rate equations and light propagation equations,the model of Er3+/Yb3+ co-doped double clad fiber amplifiers has been discussed,and the population distribution characteristics of Er3+ upper level in Er3+/Yb3+ 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 Er3+ 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 Er3+ upper level.
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