LD双面侧抽运Nd∶GGG热容激光晶体热分析

为了研究矩形晶体Nd∶GGG受到具有高斯分布激光双侧错位抽运时,激光晶体内部温度场和热形变分布情况,采用以各向异性半解析热分析为基础的方法进行了研究.当用输出功率分别都为300W从Nd∶GGG晶体两侧面错位中心抽运时,高斯半径为9.00mm,最高温度出现在前抽运面,晶体内最大温度为309.73℃；分析了激光晶体工作的特...

Analysis of thermal effect of LD double side pumped Nd:GGG heat capacity laser crystal

Based on the anisotropy semianalytical thermal analysis, the temperature field and thermal distortion of rectangle Nd:GGG crystal in a double side dislocation pumping laser was investigated. A maximum temperature rise of 309.73℃ happened on the front pumping face and the Gaussian radius w became 9.00mm with two 300W laser diode arrays side-pumping Nd:GGG laser crystal. After analyzing the working characteristics of the laser crystal, a thermal model that matches actual situation of the laser crystal was established, and the analytical expressions of the temperature field and thermal distortion field of the rectangle Nd:GGG laser crystal were obtained. With double side dislocation pumping the rectangle Nd:GGG crystal for 10s, there happened maximum thermal distortion of 28.97m and a maximum optical path difference of 13.02m. After stopping pumping for 200s, the maximum temperature rise dropped to 1.01%. These results provide theoretical basis for the optimized design of LD double side pumped heat capacity lasers.