双调Q开关热退偏补偿全固态激光器  

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

作　　者：戴殊韬[1] 纪江华[1] 朱小磊[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《中国激光》2007年第3期337-340,共4页Chinese Journal of Lasers

摘　　要：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。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.

关 键 词：激光技术 全固态激光器 电光调Q 退偏补偿 速率方程 

分 类 号：TN248.1[电子电信—物理电子学]