【摘要】 分析了弱反馈光纤光栅外腔半导体激光器的工作原理 ,将反馈作用等效为光子寿命的改变 ,利用激光器简化多模速率方程理论计算了外腔激光器输出功率和边模抑制比随光栅反射率的变化关系 ,得出外腔激光器存在光栅最佳反射率的结论。并对用不同反射率光栅作外腔的半导体激光器进行了实验比较 ,对此结论进行了验证。实验中获得了边模抑制比达 2 5dB的单模输出更多还原

【Abstract】 The theory of FBG external cavity semiconductor laser with weak feedback is simply explained. Regarding the effects of feedback as a change of photons′ life and using the simple multimodes rate equation, the effect of FBG reflectivity on both the output power and SMSR is revealed.The conclusion is that there exists an optimum FBG reflection. The experiments using FBGs with different reflection show the same conclusion. A single laser mode with 25 dB SMSR is achieved.更多还原