• High Power Laser Science and Engineering
  • Vol. 9, Issue 2, 02000e22 (2021)
Deen Wang1、2、3, Xin Zhang3, Wanjun Dai3, Ying Yang3, Xuewei Deng3, Lin Chen1、2、3, Xudong Xie3, Dongxia Hu3, Feng Jing3, Zeping Yang4, Qiang Yuan3, Xiaofeng Wei3, Qihua Zhu3, Wanguo Zheng3, Xiaomin Zhang3, and Lei Huang1、2、*
Author Affiliations
  • 1Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Education, Beijing100084, China
  • 2State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing100084, China
  • 3Research Center of Laser Fusion, CAEP, Mianyang621900, China
  • 4Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu610209, China
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    Abstract

    A 1178 J near diffraction limited 527 nm laser is realized in a complete closed-loop adaptive optics (AO) controlled off-axis multi-pass amplification laser system. Generated from a fiber laser and amplified by the pre-amplifier and the main amplifier, a 1053 nm laser beam with the energy of 1900 J is obtained and converted into a 527 nm laser beam by a KDP crystal with 62% conversion efficiency, 1178 J and beam quality of 7.93 times the diffraction limit (DL). By using a complete closed-loop AO configuration, the static and dynamic wavefront distortions of the laser system are measured and compensated. After correction, the diameter of the circle enclosing 80% energy is improved remarkably from 7.93DL to 1.29DL. The focal spot is highly concentrated and the 1178 J, 527 nm near diffraction limited laser is achieved.
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    Deen Wang, Xin Zhang, Wanjun Dai, Ying Yang, Xuewei Deng, Lin Chen, Xudong Xie, Dongxia Hu, Feng Jing, Zeping Yang, Qiang Yuan, Xiaofeng Wei, Qihua Zhu, Wanguo Zheng, Xiaomin Zhang, Lei Huang. 1178 J, 527 nm near diffraction limited laser based on a complete closed-loop adaptive optics controlled off-axis multi-pass amplification laser system[J]. High Power Laser Science and Engineering, 2021, 9(2): 02000e22
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    Category: Research Articles
    Received: Jun. 13, 2020
    Accepted: Jan. 19, 2021
    Posted: May. 28, 2021
    Published Online: May. 24, 2021
    The Author Email: Lei Huang (hl@tsinghua.edu.cn)