Yb∶YAG薄片多程激光放大器的设计及实验研究  

Design and Experimental Investigation of Yb∶YAG Thin-Disc Multipass Laser Amplifier

作　　者：宋恩茂 朱广志[1] 王海林[1] 李征远 KozlovAleksei 朱晓[1] Song Enmao;Zhu Guangzhi;Wang Hailin;Li Zhengyuan;Kozlov Aleksei;Zhu Xiao(School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China;POLYUS Research Institute of M.F.Stelmakh Joint Stock Company,Moscow 117342,Russia)

机构地区：[1]华中科技大学光学与电子信息学院,湖北武汉430074 [2]M.F.Stelmakh股份有限公司极地研究所,莫斯科117342,俄罗斯

出　　处：《光学学报》2019年第12期213-218,共6页Acta Optica Sinica

基　　金：国家重点研发计划战略性国际科技创新合作重点专项(2016YFE0202500)

摘　　要：薄片多程激光放大器通过种子光多次通过片状增益介质来提取能量,可实现高平均功率、高脉冲能量、高光束质量的激光输出,是高功率短脉冲激光系统的重要组成部分。基于Yb∶YAG片状晶体,设计并搭建了可实现种子光20次放大的薄片多程激光放大器。采用该激光器对高重复频率种子光进行放大实验,认为该片状多程激光放大器可有效保证输出光的光束质量,但光谱不匹配会影响脉冲光的单程增益。A thin-disc multipass laser amplifier enables a seed laser to frequently pass through the gain medium to extract energy. Such an amplifier can output a high average power, high pulse energy, and high beam-quality laser, which plays an important role in a high power short-pulse laser system. In this paper, a Yb∶YAG thin-disc multi-pass laser amplifier that can amplify a seed laser over the course of 20 passes is designed and constructed. An amplification of a high-repetition frequency short-pulse laser is performed, and it is found that the thin-disc multi-pass laser amplifier can effectively guarantee the beam quality of the output laser. In addition, spectral mismatch is observed to have an influence on the single gain of a short-pulse laser.

关 键 词：激光器 放大器 脉冲激光 光束质量 稳定性 

分 类 号：TN248.1[电子电信—物理电子学]