1064nm和532nm纳秒激光同时辐照熔石英损伤规律的研究  

Laser induced damage characteristics in fused silica surface irradiated by1064nm and 532nm ns laser simultaneously

作　　者：叶成 邱荣 蒋勇[1,2] 高翔[1,2] 郭德成 周强 邓承付[1,2] 

机构地区：[1]西南科技大学-中国工程物理研究院激光聚变研究中心极端条件物质特性联合实验室,四川绵阳621010 [2]西南科技大学理学院,四川绵阳621010

出　　处：《强激光与粒子束》2018年第4期14-18,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金委员会与中国工程物理研究院联合基金项目(U1530109)

摘　　要：利用Nd:YAG激光器研究基频(1064nm)与倍频(532nm)单独辐照和同时辐照下熔石英的损伤规律,对损伤几率进行了测试,获得损伤几率曲线与典型损伤形貌。研究结果表明:双波长同时辐照下的初始损伤阈值总是小于单波长辐照下的初始损伤阈值;基频光中加入定量倍频光后,熔石英对基频光的吸收效率提高;并且双波长同时辐照下,熔石英损伤密度增大;原因主要是熔石英表面缺陷对不同波长吸收机制的差异。The wavelengths of 1064 nm and 532 nm of the pulsed Nd:YAG laser were used to irradiate the fused silica to study the interaction between different wavelengths of laser with fused silica.The laser induced damage characteristics in fused silica surface were researched under separate of simultaneous irradiation of 1064 nm and 532 nm wavelengths.Testing the damage probability under different energy density,we obtained the damage probability curves and typical damage morphologies.The results show that the initial damage threshold under simultaneous irradiation with 1064 nm and 532 nm is always less than that under single wavelength irradiation.Add a certain amount of 532 nm laser to 1064 nm laser,fused silica improves the absorption efficiency for 1064 nm.The damage density of fused silica increases under double wavelength simultaneous irradiation.The reason is that the surface defects of fused silica have different absorption mechanisms for different wavelengths.

关 键 词：激光损伤 熔石英 损伤几率 损伤阈值 双波长 

分 类 号：O434.14[机械工程—光学工程]