报道了激光二极管(LD)侧面抽运的Nd:YAG薄片激光器。对影响侧面抽运薄片激光器性能的主要因素, 即圆薄片增益介质内晶体光分布和沿径向的温度分布进行了理论分析和实验。实现了光-光转换效率为33.5%, 峰值功率为230 W, 光束参数乘积为21.6 mm·mrad的激光输出。实验结果表明, 侧面抽运在薄片Nd:YAG晶体内可实现对称均匀的分布, 沿径向的温度差大大减小; Nd:YAG/YAG薄片晶体的复合可满足侧面抽运的要求。这些技术和方法可应用于更高功率的侧面抽运薄片激光器。

A diode array side pumped Nd:YAG thin disk laser was reported, and the light distribution of doped crystal and temperature distribution of the radial were studied theoretically and experimentally. The output laser peak power of 230 W, opt.-opt. efficiency of 33.5% and beam parameter product of 21.6 mm·mrad were obtained. The results of experiment showed that side pumped Nd:YAG thin disk laser could realize light uniform distribution, and decrease temperature difference of radial significantly. And composited Nd:YAG/YAG cryatal could satisfy the requirements of side pumped thin disk laser. These techniques and methods could apply to higher power side pumped thin disk laser.