Volume 16 Issue 6
Nov.  2023
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JIN Hao-shu, LIU Hui, XU Si-yuan, LU Bao-le, BAI Jin-tao. Polarization-multiplexing of a laser based on a bulk Yb:CALGO crystal[J]. Chinese Optics, 2023, 16(6): 1475-1481. doi: 10.37188/CO.EN-2023-0005
Citation: JIN Hao-shu, LIU Hui, XU Si-yuan, LU Bao-le, BAI Jin-tao. Polarization-multiplexing of a laser based on a bulk Yb:CALGO crystal[J]. Chinese Optics, 2023, 16(6): 1475-1481. doi: 10.37188/CO.EN-2023-0005

Polarization-multiplexing of a laser based on a bulk Yb:CALGO crystal

doi: 10.37188/CO.EN-2023-0005
Funds:  Supported by National Natural Science Foundation of China (No. 62005215); Natural Science Basic Research Program of Shaanxi Province (No. 2019JCW-03); Science and Technology Program of Xi'an (No. 202005YK01)
More Information
  • Author Bio:

    JIN Hao-shu (1996—), male, from Zhangjiakou, Hebei Province, master's degree candidate, obtained a bachelor's degree from Shanxi University in 2019, mainly engaged in the research of all-solid-state laser technology. E-mail: 202032252@stumail.nwu.edu.cn

    LIU Hui (1986—), male, from Chenzhou, Hunan Province, associate professor, master supervisor, obtained Ph.D from Chinese Academy of Sciences (National Time Service Center) in 2016, mainly engaged in the research of laser physics and technology. E-mail: liuhui_gzs@nwu.edu.cn

  • Corresponding author: liuhui_gzs@nwu.edu.cnbaijint@nwu.edu.cn
  • Received Date: 13 Feb 2023
  • Rev Recd Date: 27 Feb 2023
  • Available Online: 30 Mar 2023
  • The polarization-multiplexing of a laser based on a medium with a large gain bandwidth and a high thermal conductivity can benefit dual-frequency and dual-comb lasers’ spectral bandwidth and power. This paper presents a demonstration of the polarization-multiplexing of a laser based on a bulk Yb:CALGO crystal. The polarization multiplexing is realized by sandwiching the gain crystal with two birefringent crystals which are cut at 45˚ to their optical axis. This sandwich-configuration creates inside the cavity two orthogonally polarized beams which are spatially separated only in the sandwich-configuration part but collinear in other part. Meanwhile, a single pump beam is also split into two beams automatically, matching the two cavity modes. This configuration also allows the gain crystal to be located in at the waist of cavity modes, which benefits the pumping efficiency. The laser outputs watt-level power with a slope efficiency exceeding 30%. A dual-frequency operation with terahertz frequency separation is realized by inserting an etalon into the cavity.

     

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