光电探测器吸收激光后的温升以及因温升造成的各种现象，致使探测器遭受到不同程度的损伤。利用热弹性理论对CO2激光器辐照K9玻璃材料进行研究，建立激光辐照材料温升及热应力分布二维平面模型，通过解析计算得到由激光辐照半导体材料引起的温度场和应力场的瞬态分布。研究表明, K9玻璃材料的激光辐照损伤阀值与辐照时间和光斑半径相关。在同一条件下,造成的热应力损伤阀值较熔融损伤的低，故K9玻璃材料的破坏形态为热应力破坏。
Abstract
Electro-optical detectors are widely used in many fields. However, temperature rise due to the absorption of laser and other phenomena may damage detectors. Using thermal elastic theory, the investigation on K9 material radiated by CO2 laser is done. According to the two-dimensional planar model, the transient distributions of temperature field and thermal stress field which result from laser radiation on semiconductor material are obtained by analytical calculation. The results show that the K9 glass damage threshold of laser radiation is dependent on the radiation time and beam radius. Under the same conditions, the thermal stress damage threshold is lower than the melting damage threshold, so the damage reason of K9 glass material is thermal stress damage.
关键词
激光辐照效应 /
温度场 /
热应力场 /
光电探测器
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Key words
laser radiation effects /
temperature field /
electro-optical detectors /
thermal stress field
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参考文献
[1]DIENER K, GERNANDT L, MOEGLIN J P. Study of the Nd∶ YAG laser irradiation at 1.3 μm on the thermal mechanical optical parameters of germanium [J]. Optics and Lasers in Engineering, 2005, 43:1179-1192.
[2]姜楠, 牛燕雄, 张书练. 波段外脉冲激光对锗材料冲击效应的数值研究[J] . 红外与激光工程, 2008, 37(3) : 481-484.
JIANG Nan, NIU Yan-xiong, ZH ANG Shu-lian. Numerical simulation of thermal shock effect on Germanium induced by out of band pulsed laser [J]. Infrared and Laser Engineering , 2008, 37(3) : 481-484. ( in Chinese with an English abstract)
[3]崔云霞, 牛燕雄, 王彩丽,连续激光辐照锗材料损伤的数值模拟研究[J]，应用光学,2011,32(2):267-271.
CUI Yun-xia, NIU Yan-xiong, WANG Cai-li. Numerical analysis of CW laser damage in Germanium[J]. Journal of Applied Optics, 2011, 32(2):267-271. ( in Chinese with an English abstract)
[4]娄俊, 苏俊宏, 徐均琪, 等. He Ne 散射光检
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脚注
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