Infrared and Laser Engineering, Volume. 50, Issue 11, 20210481(2021)

Research on Kerr optical frequency comb generation based on MgF2 crystalline microresonator with ultra-high-Q factor

Wang Mengyu1, Fan Lekang1, Wu Lingfeng1, Lu Zhizhou2, Liu Bo1, Guo Zhuang1, and Xie Chengfeng1,*
Author Affiliations
  • 1Key Laboratory of Nondestructive Test (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China
  • 2Silicon Photonics R&D Center, Chongqing United Microelectronics Center, Chongqing 401332, China
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    Kerr optical frequency comb has an equidistantly distributed comb-like spectral structure and has important applications in precision measurement, optical clocks, coherent optical communications, microwave and optical arbitrary wave generation, spectroscopy, and calibration of astronomical spectrometers. Firstly, compared with other optical frequency comb systems, the microresonator optical frequency comb has the advantages of strong integration, small size and good flexibility, which greatly expands the application of optical frequency combs. Secondly, a MgF2 microresonator with a quality factor up to 4.8×107 was prepared by an ultra-precision machining method, and a clean, regular and regularly arranged spectrum was obtained. The free frequency range was 9.73 GHz, which provides conditions for generating low repetition rate optical frequency combs. Finally, according to the experimental results and the Lugiato-Lefever equation, the generation process of the MgF2 microresonator optical frequency comb was analyzed, and the influence of the pump power on the optical frequency comb was studied. The soliton state optical frequency comb was obtained by adjusting the detuning parameters. In addition, the optical field mode of the microresonator was optimized through dispersion control, which creates a condition for generating a soliton optical frequency comb with an ultra-smooth spectrum and improves the performance of the optical frequency comb.

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    Mengyu Wang, Lekang Fan, Lingfeng Wu, Zhizhou Lu, Bo Liu, Zhuang Guo, Chengfeng Xie. Research on Kerr optical frequency comb generation based on MgF2 crystalline microresonator with ultra-high-Q factor[J]. Infrared and Laser Engineering, 2021, 50(11): 20210481

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    Paper Information

    Category: Special issue-Advanced technology of microcavity photonics materials and devices

    Received: Jul. 14, 2021

    Accepted: --

    Published Online: Dec. 7, 2021

    The Author Email: Xie Chengfeng (xcf@nchu.edu.cn)

    DOI:10.3788/IRLA20210481

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