LD阵列双端泵浦Tm:YLF激光器

LD Array Double-end-pumped Tm:YLF Laser

对LD阵列双端泵浦Tm:YLF激光器开展研究。由于Tm:YLF晶体具有严重的热效应问题,为了实现在高功率泵浦下激光器稳定的输出,首先利用COMSOL对板条晶体进行热分布模拟分析,为实验提供必要的前提。实验中为了获得更高的激光输出功率,分别对不同透过率、不同输出镜曲率下的激光输出特性进行对比研究,最终在输出镜曲率半径为200 mm,透过率为40%,双端泵浦最大输入功率和为317.1 W时,获得了稳定连续激光输出。激光功率为52.5 W,斜效率为21.5%,本文结果为Tm:YLF激光器在高功率泵浦条件下获得高功率输出提供参考。

In this paper,the LD array double-end-pumped Tm:YLF laser is studied.Due to the serious thermal effect of Tm:YLF crystal,in order to achieve stable output of the laser under high power pumping,the thermal simulation analysis of the slab crystal is carried out by COMSOL,which provides the necessary premise for the experiment.In order to obtain higher laser output power in the experiment,the laser output characteristics under different transmittance and different output mirror curvature are compared respectively.Finally,when the radius of curvature of the output mirror is 200 mm,the trans-mittance is 40%,and the maximum input power sum of the double-end pump is 317.1 W,the stable continuous laser output power is 52.5 W,and the slope efficiency is 21.5%,which provides a reference for Tm:YLF laser to obtain high power output under high power pumping conditions.