基于有限元数值方法模拟分析了LiNbO3,DKDP,KDP等电光晶体材料在高平均功率激光负载下的热力学特性。结果表明,当入射激光功率为2 kW,光斑尺寸为20 mm×20 mm,激光照射时间为10 s时,三种材料的最大温升分别为0.45 K,7.04 K和76.02 K,最大热应力分别为0.528 MPa,4.78 MPa和47 MPa。

The thermodynamics of electro-optic switch materials such as LiNbO3, DKDP and KDP used in high average power laser systems is analyzed by use of finite element methods. The results show that when the power of input laser with the facular of 20 mm×20 mm gets up to 2 kW under the radiation time of 10 s, the maximum temperature rises of the three materials are 0.45 K, 7.04 K and 76.02 K, respectively, and the maximum thermal stresses are 0.528 MPa, 4.78 MPa, 47 MPa, respectively.