低温液冷块状Yb∶YAG激光放大器  

Cryogenic Liquid-Cooled Yb∶YAG Bulk Amplifier

作　　者：严雄伟[1] 蒋新颖[1] 王振国[1] 郑建刚[1,2] 李敏 肖凯博[1] Yan Xiongwei;Jiang Xingying;Wang Zhenguo;Zheng Jiangang;Li Min;Xiao Kaibo(Research Center of Laser Fusion , China Academy of Engineering Physics ,Mianyang , Sichuan 621900, China;Collaborative Innovation Center of IFSA (CICIFSA) , Mianyang , Sichuan 621900, China)

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]IFSA协同创新中心,四川绵阳621900

出　　处：《中国激光》2019年第9期51-56,共6页Chinese Journal of Lasers

基　　金：中物院高能激光科学与技术重点实验室基金(HEL2019-05-2)

摘　　要：针对高功率激光的应用需求,提出一种新构型的低温激光放大器方案,采用低温液体侧面冷却三角形沟槽设计的块状Yb∶YAG晶体,抑制了介质内寄生振荡,改善了热管理效果,实现了放大器高效储能与提取,获得了能量为9.4 J、脉冲宽度为10 ns、重复频率为5 Hz、远场3.3倍衍射极限的激光输出,为后续更大能量的Yb∶YAG激光放大器设计提供了有益的参考。An innovative laser amplifier architecture based on cryogenically cooled Yb: YAG bulk is developed for high-power laser application. The Yb : YAG bulk with triangular-section channels on the side is cooled using a cryogenic liquid to suppress parasitic oscillation in the medium and improve heat management. This architecture realizes high-efficiency energy storage and extraction of the amplifier, and a laser output with energy of 9.4 J, pulse width of 10 ns, repetition frequency of 5 Hz, diffraction limit far field of 3.3 is obtained, when high energy storage and extraction efficiency of the amplifier are realized. It provides a useful reference for the subsequent design of Yb: YAG laser amplifier with large energy.

关 键 词：激光光学 激光放大器 低温液冷 Yb∶YAG 侧面冷却块状放大器 二极管抽运激光器 

分 类 号：TN242[电子电信—物理电子学]