摘要
大口径高能激光装置是各强国积极研究的重点项目。对装置内大口径光学元件损伤特性进行有效评估具有非常重要的意义,在此研究大尺寸光学元件表面损伤。通过分段拍摄、图像拼合、损伤点记录、统计与归纳等工作发现,不同尺寸损伤点的分布特性差异较大。结合统计学方法与类似实验对比、理论计算等方式对损伤点分布与样品辐照环境特性变化的关系进行分析。结果显示,损伤点的位置分布与辐照光束的能量密度关联紧密;系统光束(351 nm)在低于6 J/cm^(2)时能量分布均匀,高于6.7 J/cm^(2)时呈现较为明显的高斯分布状态。可以为大口径高能辐照环境的元件损伤特性评估提供有价值的参考,对大口径紫外激光器的日常运行与维护具有极其重要的工程意义。
To establish the effective evaluation about damage properties of large-aperture and high-energy optic components,we studied the statistics of the surface damage of the DKDP component.We analysed and summarized various kinds of damage distributing in surface of the optic component by step-by-step shooting,merging images and counting damage pits.We investigated correlation distribution of damage types and irradiation conditions using statistics of surface damage data,theoretical calculation and demonstration of similar experiment.It is found that positions of damage pits are closely relevant to distribution of energy density of laser beam(3ω).When the energy density exceeds 6.7 J/cm^(2),the distribution of energy density of the laser beam can be Gaussian.On the contrary,when energy density is less than 6.7 J/cm^(2),the distribution of energy density of the laser beam can be uniform.Our study could provide a valuable reference for evaluating characteristics of damage to optical component working under irradiation in large-aperture high-energy laser.It is also reterable in operating and maintaining large-aperture high-energy laser facility.
作者
刘畅
巨新
刘宝安
孙洵
张立松
徐明霞
任宏凯
魏列宁
武鹏程
李扬
东超
闫春燕
Liu Chang;Ju Xin;Liu Baoan;Sun Xun;Zhang Lisong;Xu Mingxia;Ren Hongkai;Wei Liening;Wu Pengcheng;Li Yang;Dong Chao;Yan Chunyan(Department of Physics,University of Science and Technology of Beijing,Beijing 100083,China;State Key Laboratory of Crystal Materials,Shandong University,Ji’nan 250100,China;Weifang Medical University,Weifang 261053,China)
出处
《强激光与粒子束》
CAS
CSCD
北大核心
2021年第11期105-113,共9页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(51402173)
中央高校基本科研业务费专项资金项目(FRF-TP-15-099A1)。
