Beam reshape of high power laser diode stack

被引：0
作者：
Wu, Deyong [1 ,2 ]
Lü, Wenqiang [1 ,2 ]
Wei, Bin [1 ,2 ]
Gao, Songxin [1 ,2 ]
机构：
[1] Key Laboratory of Science and Technology on High Energy Laser, CAEP, Mianyang
[2] Institute of Applied Electronics, CAEP, P. O. Box 919-1013, Mianyang
来源：
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2014年 / 26卷 / 10期
关键词：
Beam reshaping; Diode laser; Ray tracing; Spherical lens; Stack;
D O I：
10.11884/HPLPB201426.101001
中图分类号：
学科分类号：
摘要：
Based on the ray tracing method the laser intensity distribution of single DL bar collimated with micro spherical cylindrical lens was analyzed in detail. We found that the intensity distribution of output laser have a better flat shape when the divergence angle is about 5°. A beam reshape system was designed for a 25-bar DL stack. The system includes microlens of fast axis collimating, coupling lens of fast axis and coupling lens of slow axis. The laser medium to be pumped was designed at the focus plane of fast axis coupling lens and close to the imaging plane of slow axis coupling lens. A 7 mm×8 mm pump beam was obtained with intensity uniformity of 90%. The coupling efficiency of the beam reshaping system reached 85%.
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页数：5
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