中国物理B ›› 2023, Vol. 32 ›› Issue (3): 34206-034206.doi: 10.1088/1674-1056/ac873e

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Continuous-wave optical enhancement cavity with 30-kW average power

Xing Liu(柳兴)1, Xin-Yi Lu(陆心怡)1, Huan Wang(王焕)1, Li-Xin Yan(颜立新)1,†, Ren-Kai Li(李任恺)1, Wen-Hui Huang(黄文会)1, Chuan-Xiang Tang(唐传祥)1, Ronic Chiche2, and Fabian Zomer2   

  1. 1 Department of Engineering Physics, Tsinghua University, Beijing 100084, China;
    2 Université Paris-Saclay, CNRS/IN3 P3, IJCLab, 91405 Orsay, France
  • 收稿日期:2022-07-26 修回日期:2022-08-05 接受日期:2022-08-05 出版日期:2023-02-14 发布日期:2023-02-21
  • 通讯作者: Li-Xin Yan E-mail:yanlx@mail.tsinghua.edu.cn
  • 基金资助:
    Project supported by the Fund from Tsinghua University Initiative Scientific Research Program, China (Grant No. 20191081195).

Continuous-wave optical enhancement cavity with 30-kW average power

Xing Liu(柳兴)1, Xin-Yi Lu(陆心怡)1, Huan Wang(王焕)1, Li-Xin Yan(颜立新)1,†, Ren-Kai Li(李任恺)1, Wen-Hui Huang(黄文会)1, Chuan-Xiang Tang(唐传祥)1, Ronic Chiche2, and Fabian Zomer2   

  1. 1 Department of Engineering Physics, Tsinghua University, Beijing 100084, China;
    2 Université Paris-Saclay, CNRS/IN3 P3, IJCLab, 91405 Orsay, France
  • Received:2022-07-26 Revised:2022-08-05 Accepted:2022-08-05 Online:2023-02-14 Published:2023-02-21
  • Contact: Li-Xin Yan E-mail:yanlx@mail.tsinghua.edu.cn
  • Supported by:
    Project supported by the Fund from Tsinghua University Initiative Scientific Research Program, China (Grant No. 20191081195).

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摘要： Optical enhancement cavity (OEC) is a powerful tool for fundamental research and diagnostics. In this paper, the progress of a continuous-wave OEC to realize of megawatt cavity for a novel light source based on a steady-state microbunching (SSMB) mechanism, is reported. After efficiently suppressing all external noise and optimizing the alignment, mode-matching, and polarization matching, stable and long-term locking is achieved with the help of two feedback loops. The modal instability phenomenon caused by the surface thermoelastic deformation is observed. A pair of D-shape mirrors are utilized to remove the high-order modes. Finally, an intra-cavity average power of 30 kW is reached.

关键词: optical enhancement cavity, continuous-wave laser, modal instability, high power cavity

Abstract: Optical enhancement cavity (OEC) is a powerful tool for fundamental research and diagnostics. In this paper, the progress of a continuous-wave OEC to realize of megawatt cavity for a novel light source based on a steady-state microbunching (SSMB) mechanism, is reported. After efficiently suppressing all external noise and optimizing the alignment, mode-matching, and polarization matching, stable and long-term locking is achieved with the help of two feedback loops. The modal instability phenomenon caused by the surface thermoelastic deformation is observed. A pair of D-shape mirrors are utilized to remove the high-order modes. Finally, an intra-cavity average power of 30 kW is reached.

Key words: optical enhancement cavity, continuous-wave laser, modal instability, high power cavity

中图分类号:  (Resonators, cavities, amplifiers, arrays, and rings)

  • 42.60.Da
42.60.-v (Laser optical systems: design and operation) 42.60.Fc (Modulation, tuning, and mode locking)