Laser & Optoelectronics Progress, Volume. 59, Issue 21, 2136002(2022)
Experimental Research on 2 kW Fiber Oscillator with 14 μm Core Diameter and Copper Welding
Laser welding is the key technology of new energy battery manufacturing. To ensure the full absorption of pump light and laser light conversion efficiency, 976 nm semiconductor laser pump technology is used, and the length of gain fiber is shortened to increase the laser stimulated Raman scattering threshold. And a novel gain fiber coiling method is provided to suppress the mode instability and improve the output beam quality. The output power of single-mode (M2≤1.1) laser is 2.25 kW, the Raman suppression ratio reaches -38 dB, and the length of energy transmission fiber (14 μm core diameter, numerical aperture is 0.07) reaches 7 m. The output laser has high brightness, small spot diameter, and high power density, which can effectively reduce the thermal effect during welding and avoids weld defects and spatters.
Get Citation
Copy Citation Text
Shaofeng Guo, Xiaoguang Dai, Yang Peng, Xiaoxing Dai, Wenlei Zheng, Zhaohui Zhu, Tongzheng Liu, Zhihong Xu. Experimental Research on 2 kW Fiber Oscillator with 14 μm Core Diameter and Copper Welding[J]. Laser & Optoelectronics Progress, 2022, 59(21): 2136002
Category: Letters
Received: Aug. 15, 2022
Accepted: Sep. 15, 2022
Published Online: Oct. 31, 2022
The Author Email: Guo Shaofeng (guoshaofeng@dklaser.com)