Design of a 10 kW level diode laser optical stack with a line shape beam spot

被引：2
作者：
Dong, Zhiyong [1 ,3 ,4 ]
Lin, Guyi [1 ,3 ,4 ]
Zhao, Pengfei [1 ,4 ]
Lin, Xuechun [1 ,2 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, Lab All Solid State Light Sources, Beijing 100083, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 101407, Peoples R China
[4] Beijing Engn Technol Res Ctr All Solid State Lase, Beijing 100083, Peoples R China
来源：
APPLIED OPTICS | 2020年 / 59卷 / 08期
关键词：
Lenses; -; Diodes;
D O I：
10.1364/AO.382484
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We designed and simulated a diode laser with output power of more than 10 kW and a line shape beam spot of approximately 14 - 58 mm x 1.6 mm (1/e(2) width). The diode laser was assembled with high fill factor diode laser bars that can be cooled with filtered tap water. The diode laser bar was beam shaped with a tilted cylindrical lens array to twist the slow axis of individual emitters by 90 deg, and then the slow axis was collimated with a single cylindrical lens. From the simulation, 20 laser diode bars with the same wavelength formed a diode laser optical stack with an output power of more than 3.5 kW, a beam spot of 31 mm x 12 mm size, and full divergence angles of around 6 mrad in both the horizontal and vertical directions. Then, three laser diode optical stacks with different wavelengths were wavelength-multiplexed to obtain an output power of more than 10 kW. Finally, the diode laser optical stack was transformed by simple cylindrical lenses to forma line shape spot with a working distance longer than 250 mm. Our diode laser design is much simpler than previous devices with similar output power and can find various applications such as high-speed laser cladding. (C) 2020 Optical Society of America
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收藏
页码：2319 / 2324
页数：6
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