中国物理B ›› 2026, Vol. 35 ›› Issue (2): 24210-024210.doi: 10.1088/1674-1056/ae1952

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Full stabilization of eight-channel Yb-fiber coherent beam combining system delivering 1.18-kW, 1.18-mJ, 270-fs pulses

Zhuo Shi(史卓)1,2, Zhi-Hang Du(杜志航)2, Cheng-Bin Liang(梁成斌)2, Hong-Xiang Chang(常洪祥)3, Zi-Kai Dong(董自凯)2, Hong-Yu Guo(郭鸿宇)2, Can Li(李灿)3, Pu Zhou(周朴)3, Zhi-Yi Wei(魏志义)1,2,4, and Guo-Qing Chang(常国庆)1,2,4,†   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    3 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China;
    4 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2025-09-09 修回日期:2025-10-16 接受日期:2025-10-30 发布日期:2026-01-31
  • 通讯作者: Guo-Qing Chang E-mail:guoqing.chang@iphy.ac.cn
  • 基金资助:
    Project supported by the Key Deployment Special Research Project of the Chinese Academy of Sciences (Grant No. PTYQ2022YZ0001), the National Natural Science Foundation of China (Grant Nos. 62175255 and 62227822), and the National Key Research and Development Program of China (Grant No. 2021YFB3602602).

Full stabilization of eight-channel Yb-fiber coherent beam combining system delivering 1.18-kW, 1.18-mJ, 270-fs pulses

Zhuo Shi(史卓)1,2, Zhi-Hang Du(杜志航)2, Cheng-Bin Liang(梁成斌)2, Hong-Xiang Chang(常洪祥)3, Zi-Kai Dong(董自凯)2, Hong-Yu Guo(郭鸿宇)2, Can Li(李灿)3, Pu Zhou(周朴)3, Zhi-Yi Wei(魏志义)1,2,4, and Guo-Qing Chang(常国庆)1,2,4,†   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 Songshan Lake Materials Laboratory, Dongguan 523808, China;
    3 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China;
    4 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2025-09-09 Revised:2025-10-16 Accepted:2025-10-30 Published:2026-01-31
  • Contact: Guo-Qing Chang E-mail:guoqing.chang@iphy.ac.cn
  • Supported by:
    Project supported by the Key Deployment Special Research Project of the Chinese Academy of Sciences (Grant No. PTYQ2022YZ0001), the National Natural Science Foundation of China (Grant Nos. 62175255 and 62227822), and the National Key Research and Development Program of China (Grant No. 2021YFB3602602).

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摘要： We develop an ultrafast Yb-fiber laser system based on eight-channel coherent beam combining utilizing commercially available rod-type Yb-fibers. To ensure good combining efficiency and long-term operation of the system at the attosecond laser facility under construction, we fully stabilize the phase, group-delay, and beam-pointing of the eight fiber channels. Especially, we propose a novel multi-step hill climbing method to control both group-delay and beam-pointing. At a repetition rate of 1 MHz, this laser system delivers 270-fs pulses with 1.18-kW average power (1.18-mJ pulse energy). The average-power instability of the laser system running for 12 hours is 0.32 %.

关键词: ultrafast fiber laser, high power and high energy, coherent beam combining

Abstract: We develop an ultrafast Yb-fiber laser system based on eight-channel coherent beam combining utilizing commercially available rod-type Yb-fibers. To ensure good combining efficiency and long-term operation of the system at the attosecond laser facility under construction, we fully stabilize the phase, group-delay, and beam-pointing of the eight fiber channels. Especially, we propose a novel multi-step hill climbing method to control both group-delay and beam-pointing. At a repetition rate of 1 MHz, this laser system delivers 270-fs pulses with 1.18-kW average power (1.18-mJ pulse energy). The average-power instability of the laser system running for 12 hours is 0.32 %.

Key words: ultrafast fiber laser, high power and high energy, coherent beam combining

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.60.-v (Laser optical systems: design and operation) 42.81.-i (Fiber optics)