中国激光, 2018, 45 (10): 1005004, 网络出版: 2018-10-12
大功率半导体激光器波导热透镜效应及对慢轴光束发散角的影响 下载: 1462次
Thermal Lens Effect of High Power Semiconductor Laser Waveguide and Its Influence on Beam Divergence Angle of Slow Axis
激光器 半导体激光器 热透镜 热分析 慢轴发散角 lasers semiconductor laser thermal lens thermal analysis slow axis divergence angle
摘要
模拟分析了大功率半导体激光器的稳态温度场, 通过温度场计算半导体激光器的热透镜焦距及其对慢轴发散角的变化量, 并获得半导体激光器的热功率及其关系。分析表明, 相同条件下热功率与热透镜焦距近似为反比关系, 与慢轴光束发散角近似为线性关系。当热功率达到10 W时, 热透镜焦距为568 μm, 慢轴发散角增加约10°。实验测量了不同工作电流条件下激光器的慢轴发散角, 结果显示模拟值与实验值基本一致。
Abstract
The steady-state temperature distribution of high-power semiconductor lasers is simulated, the thermal lens focal length and the variation of the slow axis divergence angle are calculated with the temperature distribution under different thermal power conditions. Results show that, under the same conditions the thermal power and the thermal lens focal length are approximately inversely proportional, and the slow axis divergence angle is approximately linear with thermal power. When the thermal power reaches 10 W, the thermal lens focal length is 568 μm, and the slow axis divergence angle increases about 10°. The slow axis divergence angle of the laser under different working current conditions is measured and the results show that the simulated values are consistent with the experimental values.
宋健, 高欣, 闫宏宇, 张晓磊, 张哲铭, 徐雨萌, 顾华欣, 刘力宁, 薄报学. 大功率半导体激光器波导热透镜效应及对慢轴光束发散角的影响[J]. 中国激光, 2018, 45(10): 1005004. Song Jian, Gao Xin, Yan Hongyu, Zhang Xiaolei, Zhang Zheming, Xu Yumeng, Gu Huaxin, Liu Lining, Bo Baoxue. Thermal Lens Effect of High Power Semiconductor Laser Waveguide and Its Influence on Beam Divergence Angle of Slow Axis[J]. Chinese Journal of Lasers, 2018, 45(10): 1005004.