双调Q开关热退偏补偿全固态激光器

为了有效地补偿激光二极管(LD)侧向抽运1000 Hz重复率电光调QNd:YAG激光器棒状增益介质内存在的热致双折射损耗,设计了一种新颖的双调Q晶体开关复合谐振腔结构。实验结果表明,设计的双调Q晶体开关结构Nd:YAG激光器输出激光脉冲能量比单调Q晶体开关结构的非补偿腔输出能量提高了56％,当侧面抽运半导体激光器输出功率达到450 W时,激光输出达到30 mJ/pulse,输出光束偏振度优于10:1,激光脉冲宽度约14 ns。并获得6．7％的光一光转换效率。通过对双调Q开光激光谐振腔进行建模,并用求解速率方程对其特性进行理论分析,所得的计算结果与实验结果基本吻合。

Novel Double Q-Switcher Structure for Thermal Induced Depolarization Compensation in All-Solid-State Laser

In this paper,a novel double Q-switcher structure is designed in order to compensate the thermal induced birefringence in the active medium of 1 kHz laser diode(LD)side-pumped electro-optic Q-switched Nd:YAG laser. The experiment result shows that pulse energy of the double Q-switch Nd:YAG laser is 56% higher than the same situation in single Q-switch uncompensated structure.When the laser output power is up to 450 mJ,pulse energy of 30 mJ is obtained,the extinction ratio of beam is better than 10:1,the pulse duration is about 14 ns,and the optical-to-optical conversion efficiency is 6.7%.At the same time,the novel cavity is modelled and numerically calculating is made by using rate equations,the results are accorded with the experiment.