高能激光系统中不同材料合束镜的热效应分析  

Analysis of the thermal effects of different material beam combiner mirror in high-energy laser system

作　　者：崔莉军 陈星明[1] 杨美霞[1] 代俊[1] 刘文兵[1] 黄守彬 CUI Lijun;CHEN Xingming;YANG Meixia;DAI Jun;LIU Wenbing;HUANG Shoubin(Southwest Institute of Technical Physics,Chengdu 610041,China)

机构地区：[1]西南技术物理研究所,成都610041,中国

出　　处：《激光技术》2024年第2期159-165,共7页Laser Technology

摘　　要：为了研究高能激光系统内光路中合束镜受强激光辐射会产生温升和热变形等问题,建立了热仿真的理论模型,采用有限元分析软件分析了不同激光功率辐照下以硅、碳化硅、石英玻璃和微晶玻璃为基底材料的合束镜的温升和热变形,以及极端环境下以石英玻璃、微晶玻璃为基底材料的合束镜的温升和热变形。结果表明,在22℃时,30 kW的单光束激光照射10 s后,4种基底材料中,碳化硅的温度为23.718℃是最低的,微晶玻璃的热形变为0.00115是最小的;30 kW总功率的6个光束激光照射时,微晶玻璃的热形变为0.000399μm,且石英玻璃的热形变比微晶玻璃高出18.8倍;在极端环境下,热形变最小的基底材料也是微晶玻璃;4种基底材料中,微晶玻璃最适合作为高能激光系统中合束镜的基底材料。此研究结果对高能激光系统设计有着一定的实际参考价值。A theoretical model of the thermal simulation was established to study the problem of temperature rise and thermal deformation of the beam combiner mirror in the optical path of a high-energy laser system caused by strong laser radiation.The temperature rise and thermal deformation of the beam combiner mirror with silicon,silicon carbide,quartz glass,and glass-ceramics as substrate materials were analyzed by finite-element analysis software under different laser power irradiation.At the same time,the temperature rise and thermal deformation of the beam combiner mirror with quartz glass and glass-ceramics as substrate materials under extreme conditions were simulated and analyzed.The results show that at 22℃,after 10 s of 30 kW single-beam laser irradiation,the temperature of silicon carbide is the lowest at 23.718℃among the four substrate materials,and the thermal deformation of glass-ceramics is the smallest at 0.00115μm.The thermal deformation of glass-ceramics is 0.000399μm when irradiated by a six-beam laser with a total power of 30 kW,while the thermal deformation of quartz glass is 18.8 times higher than that of glass-ceramics at the same six-beam.Under extreme conditions,the substrate material with the smallest thermal deformation is also glass-ceramics.Therefore,among the four substrate materials,glass-ceramics is the most suitable as substrate material for the beam combiner mirror in the high-energy laser system.The research results have certain practical reference values for the design of high-energy laser systems.

关 键 词：激光光学 高能激光系统 热效应 合束镜 

分 类 号：O437[机械工程—光学工程]