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高重频CO2激光损伤HgCdTe晶体的数值分析

汤伟 吉桐伯 郭劲 邵俊峰 王挺峰

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, 6(5): 736-742. doi: 10.3788/CO.20130605.0736
引用本文: 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, 6(5): 736-742. doi: 10.3788/CO.20130605.0736
TANG Wei, JI Tong-bo, GUO Jin, SHAO Jun-feng, WANG Ting-feng. Numerical analysis of HgCdTe crystal damaged by high repetition frequency CO2 laser[J]. Chinese Optics, 2013, 6(5): 736-742. doi: 10.3788/CO.20130605.0736
Citation: TANG Wei, JI Tong-bo, GUO Jin, SHAO Jun-feng, WANG Ting-feng. Numerical analysis of HgCdTe crystal damaged by high repetition frequency CO2 laser[J]. Chinese Optics, 2013, 6(5): 736-742. doi: 10.3788/CO.20130605.0736

高重频CO2激光损伤HgCdTe晶体的数值分析

doi: 10.3788/CO.20130605.0736
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(No.SKLLIM1004-01)

详细信息
    作者简介:

    汤伟(1985-),男,黑龙江绥棱人,博士研究生,2009年于天津科技大学获得学士学位,主要从事激光辐照效应、热控方面的研究。E-mail:twei222@163.com

    通讯作者:

    郭劲

  • 中图分类号: TN241;TN213

Numerical analysis of HgCdTe crystal damaged by high repetition frequency CO2 laser

  • 摘要: 针对CO2激光作用下HgCdTe晶体的损伤问题进行了数值分析。首先,建立了高重频CO2激光损伤Hg0.784Cd0.216Te晶体的三维热传导物理模型;然后,利用有限元方法计算了单脉冲和高重频CO2激光作用下,Hg0.784Cd0.216Te晶体的损伤阈值;最后,分析了激光重频以及辐照时间对晶体损伤阈值的影响。研究结果表明:单脉冲激光辐照下,晶体的损伤阈值为64.5 J/cm2;高重频(f1 kHz)激光辐照下,激光重频的改变对晶体损伤阈值的影响较小,损伤阈值应由平均功率密度表征,且与辐照时间密切相关;辐照时间的增加,可以有效地减小晶体的损伤阈值,当激光辐照功率密度1.95 kW/cm2时,不会发生晶体损伤。研究结果对高重频CO2激光在激光加工以及激光防护的应用方面具有指导意义。
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出版历程
  • 收稿日期:  2013-08-11
  • 修回日期:  2013-09-27
  • 刊出日期:  2013-10-10

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