Optics and Precision Engineering, Volume. 31, Issue 9, 1325(2023)

Design and verification of dual-cell cesium optically pumped magnetometer

Yiming HUANG1... Shaoliang LI2, Manruo LUO1, Zhaocai WU3 and Hua LIU1,* |Show fewer author(s)
Author Affiliations
  • 1School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai200240, China
  • 2Shanghai Aerospace Control Technology Institute, Shanghai Inertia Engineering Technology Research Center, Shanghai01109, China
  • 3Second Institute of Oceanography, The Ministry of Natural Resources, Hangzhou10012, China
  • show less

    Regarding the wide application of geomagnetic field measurement in magnetic prospecting, navigation, and positioning, the measurement range of the single-cell self-oscillating optically pumped magnetometer (OPM) is limited by the phase-shift circuit, and the existing dual-cell OPM abroad exhibits a low integration degree and poor portability. In this study, the integration of the dual-cell OPM is improved to break the blockade and improve the research level of the domestic OPM. Through the derivation and demonstration of the principle of the OPM, a highly integrated structure design of the dual-cell cesium OPM is presented. A VCSEL is used as the pump light source, and a knife-edge right-angle prism mirror is used as the spectroscope, while other components are arranged symmetrically along the optical axis. A dual-pump light structure with left- and right-handed circularly polarized light and a dual-cell arrangement is used, which achieves precise phase-shift compensation and avoids the need for a phase-shift circuit. The geomagnetic field in the experimental environment is 37 586.79 nT, as measured by a prototype, and the magnitude of the triaxial component is obtained via the scanning method. The measurement range of the OPM prototype is 25 700-77 000 nT, and the sensitivity is approximately 20 pTHz. The experimental results are consistent with the comparative measurement and theoretical calculation results, validating the theoretical analysis of the dual-cell OPM and confirming its feasibility, accuracy, and advantages for improving the system integration.

    Tools

    Get Citation

    Copy Citation Text

    Yiming HUANG, Shaoliang LI, Manruo LUO, Zhaocai WU, Hua LIU. Design and verification of dual-cell cesium optically pumped magnetometer[J]. Optics and Precision Engineering, 2023, 31(9): 1325

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Micro/Nano Technology and Fine Mechanics

    Received: Sep. 22, 2022

    Accepted: --

    Published Online: Jun. 6, 2023

    The Author Email: LIU Hua (liuyuhua@sjtu.edu.cn)

    DOI:10.37188/OPE.20233109.1325

    Topics