LD端面泵浦的高重频Nd:YAG激光器的热效应研究

在LD端面泵浦的高重频Nd：YAG激光器的光泵浦过程中产生的热效应是影响激光输出特性和系统综合性能的重要因素。从热传导方程入手，利用有限元法求得激光晶体中温度稳态分布的数值解，同时对其热透镜效应进行了计算分析，在此基础上运用传播圆一变换圆的图解分析法进行热稳腔的分离参数设计以补偿热透镜效应。该研究为进一步优化激光器设计，提高激光输出的稳定性奠定了基础。

Study on thermal effects of LD end-pumped high-repetition-rate Nd:YAG laser

The thermal effects of LD end-pumped Nd:YAG high-repetition-rate solid laser during the optical pumping are the important factor which affects the laser output characteristic and the system integrated performance. Starting with the thermal conduction function, the numerical value of temperature steady distributing in the laser crystal is found by the finite element method. And thermal lens effect is counted and analyzed. Then the separate parameters design of thermal insensitive cavity is processed to compensate the thermal lens effect by the propagation-circle and transform-circle graphic analysis and design method. The study establishes the base for optimizing the design of laser to improve the stabilization of laser output.