LD环形侧面抽运晶体吸收能量分布特性研究

针对激光晶体不同的表面处理方式,建立了多个半导体激光器阵列同时抽运激光晶体时吸收抽运光功率分布的数学模型,采用光线追迹的方法计算了半导体激光器环形侧面抽运高功率固体激光器中激光晶体对抽运光的吸收分布情况。重点根据不同表面处理方式的激光晶体对抽运光的吸收情况,分析了晶体表面处理对抑制ASE效应和获得高效率激光输出的影响。结果表明,晶体表面散射率的提高,能够有效地抑制ASE效应的产生,但同时会降低抽运光与激光输出的模式匹配程度,降低激光器的效率。

Absorption property of laser rod circle-side-pumped by LD

For the different surface treatment of the laser crystal,a mathematical model was created to describe the absorbed energy distribution in the laser crystal of the multi LD arrays circle-side-pumped solid-state lasers.Ray-tracing method was taken to calculate the distribution in the crystal.The study was mainly about the influence of the different surface treatment of the laser crystal on the distribution of the absorbed energy,and the surface treatment can restrain the amplified spontaneous emission(ASE) in the resonator but decrease the laser efficiency.The result indicates that increasing the scatter ratio of the crystal surface can restrain the ASE but reduce the laser efficiency.