激光技术, 2009, 33 (1): 27, 网络出版: 2010-01-22
重频应用下电光晶体温度场应变场影响因素
Influence factors of temperature and strain distribution in electro-optic crystal for repetition frequency lasers
光学器件 电光开关 温度场 应变场 有限元法 重复频率 optical devices electro-optic switch temperature distribution strain distribution finite element method repetition frequency
摘要
为了将等离子体电光开关应用在重复频率下,基于有限元法,数值模拟了重复频率激光负载下电光晶体吸收系数、电光晶体厚度、光斑边界和晶体边界相对距离、功率密度分布对电光晶体中温度场应变场分布影响规律。数值模拟表明,晶体内热沉积大小取决于吸收系数和晶体厚度,而温度场分布不仅和入射激光功率密度分布有关,还与光斑边界和晶体边界相对距离密切相关。结果表明,温度场分布和晶体热力学参量一起决定了晶体内应变场大小及分布。
Abstract
In order to use plasma electro-optic switch in repetition frequency lasers,the effect of crystal absorption coefficient,the crystal thickness,the distance between focula boundary and crystal boundary,power-intensity distribution,on temperature and strain distribution was analyzed by means of finite element method.The simulation results indicate that the heat deposit depends on absorption coefficient and crystal thickness,the temperature distribution is not only related with power intensity distribution of incident laser but also the distance between focula boundary and crystal boundary.The temperature distribution as well as the thermodynamic parameter determinates the strain field.
张君, 魏晓峰, 张雄军, 吴登生, 田晓琳. 重频应用下电光晶体温度场应变场影响因素[J]. 激光技术, 2009, 33(1): 27. ZHANG Jun, WEI Xiao-feng, ZHANG Xiong-jun, WU Deng-sheng, TIAN Xiao-lin. Influence factors of temperature and strain distribution in electro-optic crystal for repetition frequency lasers[J]. Laser Technology, 2009, 33(1): 27.
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