摘要
通过对二极管激光器端面抽运激光晶体工作特点的分析,提出了长方形激光晶体热模型。在热模型中考虑了激光晶体具有沿轴向对称加热、周边恒温等特点。利用热传导方程得出了激光晶体内部温度场和端面热形变场的一般解析表达式。研究结果表明,若使用输出功率为18W的二极管激光器端面抽运Nd:YVO4晶体(钕离子掺杂质量分数为0.5%),抽运光斑为0.4mm时,长方形激光晶体抽运端面具有267.6℃的最大温升和发生6.2μm的最大热形变量。对激光晶体产生的温度场和端面热形变场的研究为解决晶体热透镜效应、提高激光器的性能起指导作用。
Through analysis for the performance features of laser crystal end-pumped by a diode laser, a quadrate laser crystal thermal model is established. In the thermal model, some characteristics, such as axially symmetrical heated crystal with a fixed boundary temperature, are considered. Based on thermal conductive equation, the analytical solutions for the interior temperature field of laser crystal and the thermal distortion field of pump-face are obtained. The study shows that when the pump power is 18 W and the diameter of pump spot is 0.4 mm, the pump-face of 0.5% concentration Nd:YVO4 crystal can obtain 267.6°C maximal temperature raise and has 6.2 μm maximal thermal distortion. The study for temperature fields and pump-face thermal distortions will offer a theoretical direction for solving thermal lens effect of laser crystal to improve laser performance.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2005年第4期35-38,共4页
Opto-Electronic Engineering
基金
陕西省教育厅专项科研项目(04JK129)
关键词
激光二极管
激光晶体
温度场
热效应
热形变场
Laser diodes
Laser crystal
Temperature field
Thermal effects
Thermal distortion field
