Chinese Optics Letters, Volume. 22, Issue 10, 101302(2024)

Miniature laser frequency stabilization module for cold atom sensing

Qingzhe Gou1...2, Ning Wei2,3, Haixu Tao2,3, Kang Cheng1,2, Yongtao Fan2,3, Jiajing He2,3,*, and Jun Wang1,23,** |Show fewer author(s)
Author Affiliations
  • 1School of Microelectronics, Shanghai University, Shanghai 201800, China
  • 2Qiguang Research and Innovation Center, Aerospace Laser Technology and Systems Department, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(7)
    Structure of the miniature laser frequency-stabilization module. (a) Three-dimensional image of the miniature frequency-stabilization module; (b) photograph of the module after assembly. PCB, printed circuit board; TEC, thermoelectric cooler.
    Hyperfine structure of 85Rb and 87Rb D2 line.
    Block diagram of the miniature laser frequency-stabilization module. The two solid line boxes represent the components packaged by the module—optical and electrical parts, respectively, and the dashed line box represents the components of the digital control circuits utilized in the feedback loop.
    (a) Signal absorption of Rb bubble saturation with a length of 10 and 50 mm; (b) Fg = 2 → Fe = 1 error signal for 87Rb 52S1/2 → 52P3/2 transition.
    Saturation absorption spectra of Rb cell at different temperatures.
    Output laser frequency fluctuates over 1000 s under free-running and locked conditions. The black curve before the 1000 s shows the frequency drift range of the free-running 780 nm laser is 22 MHz. After the feedback is on, the red and gray lines show the more than 20 times reduction of the frequency drift of the 780 nm laser locked to the miniature module and the commercial stabilization setup, respectively.
    (a) Magneto-optical traps; (b) cloud of cold atoms.
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    Qingzhe Gou, Ning Wei, Haixu Tao, Kang Cheng, Yongtao Fan, Jiajing He, Jun Wang, "Miniature laser frequency stabilization module for cold atom sensing," Chin. Opt. Lett. 22, 101302 (2024)

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    Paper Information

    Category: Integrated Optics

    Received: Apr. 15, 2024

    Accepted: May. 23, 2024

    Published Online: Oct. 17, 2024

    The Author Email: Jiajing He (jiajinghe@siom.ac.cn), Jun Wang (jwang@siom.ac.cn)

    DOI:10.3788/COL202422.101302

    CSTR:32184.14.COL202422.101302

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