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掺镱光纤放大器中受激拉曼散射的数值分析

Numerical analysis of stimulated Raman scattering in Yb^(3+)-doped fiber amplifier
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摘要 采用描述泵浦光、信号光和Stokes光的稳态速率方程组,对不同光纤参数及泵浦光参数下掺镱光纤放大器内的泵浦光、信号光以及Stokes光沿光纤轴向的演化进行了数值分析.结果表明:受激拉曼散射的发生会导致信号功率在达到增益饱和之前迅速下降;增大泵浦功率,采用掺杂浓度较高的掺镱光纤以及较大吸收截面的泵浦光可以在较短光纤内获得较好的信号放大而避免受激拉曼散射的发生. Power evolution of pump,signal and Stokes wave in Yb3+-doped fiber amplifier is analyzed by solving steady-state rate equations of pump,signal and Stokes wave numerically at different parameters of fiber and pump of the Yb3+-doped fiber amplifier to investigate the impact of stimulated Raman scattering(SRS) on the Yb3+-doped fiber amplifier.The numerical results indicate that SRS can cause the signal power to decrease rapidly before the signal power gains saturation.However higher power amplification of signal can be achieved in shorter fiber via increasing pump power,using Yb3+-doped fiber with higher doping intensity or using pump with larger absorption cross section,with the avoidance of SRS.
出处 《东北师大学报(自然科学版)》 CAS CSCD 北大核心 2010年第2期63-67,共5页 Journal of Northeast Normal University(Natural Science Edition)
基金 教育部科学技术研究重点项目(108045) 中央高校基本科研业务费专项资金资助项目(09QNJ010)
关键词 掺镱光纤放大器 受激拉曼散射 稳态速率方程 Yb3+-doped fiber amplifier stimulated Raman scattering steady-state rate equations
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