提高半导体激光二极管功率密度的光束整形方法 |
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引用本文: | 辛光泽,陈东启,蔡毅,白廷柱,王岭雪. 提高半导体激光二极管功率密度的光束整形方法[J]. 红外与激光工程, 2019, 48(8): 805010-0805010(7). DOI: 10.3788/IRLA201948.0805010 |
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作者姓名: | 辛光泽 陈东启 蔡毅 白廷柱 王岭雪 |
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作者单位: | 1.北京理工大学 光电学院 纳米光子学与超精密光电系统北京市重点实验室,北京 100081 |
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基金项目: | 国家自然科学基金(61471044) |
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摘 要: | 针对半导体激光二极管由束散角大(14~46)导致的激光功率密度在传播过程中不断衰减的问题,提出了一种提高激光功率密度的光束整形方法。首先以X型柱面平凸透镜和Y型柱面平凸透镜对激光二极管输出光束慢轴和快轴方向进行准直,然后通过一对平凸透镜组合进行扩束,进一步提高光束平行度,最后由单片平凸透镜将光束聚焦为高功率密度的光点。采用Light Tools软件仿真光路、优化光学元件参数,对光学元件进行实际选型后安装并调试光束整形系统。测试结果表明:半导体激光二极管输出光束的67%激光能量汇聚于直径1 mm圆内,激光功率密度优于30 W/cm2。
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关 键 词: | 光束整形 激光二极管 光束聚焦 功率密度 |
收稿时间: | 2019-03-11 |
Beam shaping method to improve power density of semiconductor laser diodes |
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Affiliation: | 1.Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems,School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China |
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Abstract: | To solve the problem that the power density of laser beam attenuated along the propagation direction, which was caused by large beam divergence angle (14-46) of semiconductor laser diode, a beam shaping optical system to improve power density was proposed. An X type planoconvex cylindrical lens and a Y type planoconvex cylindrical lens were selected to collimate the laser beam. Then, a pair of planoconvex spherical lenses were applied to improve the parallelism. Finally, a single planoconvex spherical lens focused the laser beam to a spot with high power density. The lenses were chosen and optimized through Light Tools simulation. A real beam shaping optical system was mounted and built. Test results show that 67% laser power is converged into a cycle with diameter of 1 mm, and the power density is over 30 W/cm2. |
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