中国光学Issue(5)：736-742,7.DOI:10.3788/CO.20130605.0736
高重频 CO2激光损伤 HgCdTe 晶体的数值分析
Numerical analysis of HgCdTe crystal damaged by high repetition frequency CO2 laser
摘要
Abstract
To obtain thermal damage characteristics of the HgCdTe crystal irradiated by a CO 2 laser, the theo-retical model of Hg0.784 Cd0.216 Te crystal damaged by the high repetition frequency CO 2 laser was developed, and then the damage thresholds of Hg 0.784 Cd0.216 Te crystal irradiated by a single pulse laser and a high repeti-tion frequency laser were calculated based on the finite element method .Finally, the effect of irradiation time and laser repetition frequency on the damage thresholds was analyzed .The results show that the damage threshold of the crystal radiated by a single pulse laser is 64.5 J/cm 2 .In the high repetition frequency (f>1 kHz) CO2 laser irradiation, the damage threshold of the crystal mainly depends on the laser average power density and irradiation time, and is independent of the laser repetition frequency .With the increase of irradia-tion time, the damage threshold can effectively be reduced .When the laser average power density is less than 1.95 kW/cm 2 , the crystal damage will not occur .The conclusions have a reference value for laser processing and protection.关键词
激光损伤/损伤阈值/重复频率/HgCdTe晶体Key words
laser damage/damage threshold/high repetition frequency/HgCdTe crystal分类
信息技术与安全科学引用本文复制引用
汤伟,吉桐伯,郭劲,邵俊峰,王挺峰..高重频 CO2激光损伤 HgCdTe 晶体的数值分析[J].中国光学,2013,(5):736-742,7.基金项目
激光与物质相互作用国家重点实验室自主基础研究资助项目 （）
