Chinese Optics Letters, Volume. 22, Issue 12, (2024)

Closed-loop atomic spin polarization detection based on EOAM modulation in K-Rb-21Ne co-magnetometers [Early Posting]

Fan Shimiao, Fan Wenfeng, Yuan Qi, Li Xiaoping, Pei Hongyu, Quan Wei, Duan Lihong
Author Affiliations
  • China
  • Beihang University
  • BUAA
  • show less

    We propose a high-sensitivity spin polarization detection scheme based on optical amplitude modulation in atomic co-magnetometers, which is different from the traditional configuration.A linearly polarized laser with intensity modulation interacts with electron spins, generating optical rotation angles. Through differential amplification and demodulation, atomic spin polarization information is extracted with high precision. The effectiveness of the proposed method is verified by applying external perturbations during testing. Compared to traditional detection methods, the proposed approach effectively enhances inertial measurement sensitivity. Specifically, at 1 Hz, the measurement sensitivity has increased from 9.7 ×10−6 °/s/Hz1/2 to 3.25 ×10−6 °/s/Hz1/2. Furthermore, the proposed scheme is easily integrable and conducive to future research on miniaturizing co-magnetometers, and can also be applied to many other related fields.

    Paper Information

    Manuscript Accepted: Jun. 24, 2024

    Posted: Jul. 9, 2024

    DOI: 10.3788/COL202422.121201