高功率CO_2激光器高反膜红外耦合窗热形变的半解析方法的研究  

Semi-analytical solution of the thermal distortion of the HR-coating infrared output-coupler in high power CO_2 laser

作　　者：史彭[1] 李隆[1] 何化岳[1] 李东亮[1] 甘安生[1] 

机构地区：[1]西安建筑科技大学理学院,西安710055

出　　处：《激光杂志》2004年第6期4-6,共3页Laser Journal

基　　金：西安建筑科技大学基础研究基金 ( 0 2BR0 8)资助 ;陕西省教育厅 2 0 0 4年专项科研项目 ( 0 4JK12 9)资助

摘　　要：为了有效地解决高功率CO2 激光器高反膜红外耦合窗吸收谐振腔内激光能量产生热效应问题 ,通过对红外耦合窗镀膜参数和工作特性分析 ,建立了红外耦合窗热模型。基于热传导方程和边界条件 ,利用半解析热分析方法得出当CO2 激光器具有理想的TEMoo模式输出时红外耦合窗的温度场和热形变的计算表达式 ,同时对影响红外耦合窗温度场分布的各种因素进行了讨论。研究结果与以往将谐振腔内振荡激光做均匀光强处理作了对比 ,不仅热模型更符合激光器系统 ,而且计算出温度场分布也更加准确。研究方法和结论还可以应用到其它具有轴对称性激光束模式产生的温度场。In order to effectively solve high power CO 2 laser's HR-coating infrared output-coupler absorbing laser energy generate thermal effect problem,over coating parameters and working characteristic analysis, the infrared output-coupler thermal model is built.Based on the heat conduct equation and boundary condition,under the CO 2 laser having TEM 00 model output the infrared output-coupler's temperature field and thermal deformation field calculation expressions are given by the semi-analytical thermal analysis method.And some relevant parameters,which will influence the infrared output-coupler temperature field distribution,are discussed simultaneously.The result shows that compared with the solution which is looked lasing light in resonant as the uniform light intensity distribution,the semi-anslytical thermal analysis method introducing not only the thermal model have better coincidence with practicality,but also temperature field distribution have much more accuracy.The research method and results have also ordinary applied character,and can also be used to analysis that models having axis-symmetrical light distribution temperature field and thermal deformation field.

关 键 词：半解析热分析方法 高功率CO2激光器 红外耦合窗 高反膜 

分 类 号：TN248.13[电子电信—物理电子学]