非链式脉冲HF激光泵浦的Fe:ZnSe激光器输出能量特性研究  

Output Energy of Fe:ZnSe Laser Pumped by Non-Chain Pulsed HF Laser

作　　者：陶蒙蒙[1] 黄珂[1] 黄超[1] 朱峰[1] 马连英[1] 谌鸿伟[1] 李高鹏[1] TAO Mengmeng;HUANG Ke;HUANG Chao;ZHU Feng;MA Lianying;CHEN Hongwei;LI Gaopeng(State Key Laboratory of Laser Interaction With Matter,Northwest Institute of Nuclear Technology:Xi’an 710024,China)

机构地区：[1]激光与物质相互作用国家重点实验室,西北核技术研究所,西安710024

出　　处：《现代应用物理》2022年第3期55-63,共9页Modern Applied Physics

基　　金：国家自然科学基金资助项目(62105268);激光与物质相互作用国家重点实验室基金资助项目(SKLLIM2009,SKLLIM2113)。

摘　　要：对非链式脉冲HF激光泵浦的Fe:ZnSe激光器能量输出特性开展了理论模拟和实验研究。模拟结果表明,理想条件下,激光脉冲能量与泵浦光脉冲能量呈线性关系,重叠因子和Fe:ZnSe晶体表面反射率对激光器的能量输出特性有较大影响。实验测试表明,Fe:ZnSe晶体的表面损伤阈值约为1.2 J·cm^(-2),较短的腔长更有利于激光器的脉冲能量提取。相关发现可为后续实验研究及Fe:ZnSe激光器提供借鉴。通过优化,在单脉冲输出条件下,最高获得了120 mJ的单脉冲能量输出;在20 Hz和50 Hz重频输出条件下,连续输出约30个脉冲,单脉冲能量均大于30 mJ,对应的平均功率分别大于600 mW和1.5 W。上述结果验证了室温下利用非链式脉冲HF激光泵浦Fe:ZnSe激光器获得大能量中红外脉冲激光和高功率重频中红外脉冲激光输出的可行性。In this paper, the output energy characteristics of Fe:ZnSe laser pumped by non-chain pulsed HF laser are theoretically simulated and experimentally studied. The simulation results show that, the output energy of Fe:ZnSe laser has a linear relationship with the HF pump, and the overlapping factor and the surface reflectivity of Fe:ZnSe crystal are important factors affecting the output energy characteristics of Fe:ZnSe lasers. Experiments show that the surface damage threshold of the tested Fe:ZnSe crystal is about 1.2 J·cm^(-2),and a shorter cavity length provides higher output energy. At single shot operation, a maximal output energy of over 120 mJ is generated. The average output power reaches over 600 mW and 1.5 W, respectively for 20 Hz and 50 Hz operation with a single pulse energy bigger than 30 mJ. The above results demonstrate the feasibility of generating high energy and high average power mid-infrared laser output from non-chain HF pumped Fe:ZeSe lasers at room temperature.

关 键 词：中红外激光光源 HF激光器 损伤阈值 大能量脉冲激光输出 

分 类 号：TN244[电子电信—物理电子学] O434[机械工程—光学工程]