High Power Laser and Particle Beams, Volume. 36, Issue 3, 031001(2024)
2 kW fiber laser pumped by long-wavelength laser diodes
The high-power fiber laser pumped by laser diodes (LDs) has the advantages of high efficiency, small size, light weight, and good stability, and has been widely used in many fields such as industrial processing. To improve the absorption rate of pump laser, the 915 nm and 976 nm LDs are commonly used as the pump source of the traditional fiber lasers. The quantum defect and pump absorption coefficient are comparatively high in the fiber lasers pumped by these LDs, which leads to low transverse mode instability (TMI) threshold. To improve quantum efficiency and potential TMI threshold, the fiber laser directly pumped by LDs with wavelength longer than 1010 nm is proposed. An oscillating-amplifying integrated laser was built, and 2.05 kW output laser with beam quality M2 of 1.7 was realized when the fiber laser was pumped by 1010 nm LDs with maximum pump power of 2.56 kW. In the future, fiber laser with higher output power and better beam quality can be realized by increasing the pump power and optimizing the fiber characteristics.
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Peng Wang, Xiangming Meng, Hanshuo Wu, Yun Ye, Baolai Yang, Xiaoming Xi, Chen Shi, Hanwei Zhang, Xiaolin Wang, Fengjie Xi, Zefeng Wang, Xiaojun Xu, Pu Zhou, Jinbao Chen. 2 kW fiber laser pumped by long-wavelength laser diodes[J]. High Power Laser and Particle Beams, 2024, 36(3): 031001
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Received: Jan. 24, 2024
Accepted: Feb. 27, 2024
Published Online: Mar. 20, 2024
The Author Email: Wang Xiaolin (chinaphotonics@163.com), Wang Zefeng (zefengwang_nudt@163.com), Chen Jinbao (kdchenjinbao@aliyun.com)