Work

Application and Performance Improvement of an Optical Power Stabilization System Based on MEMS-LCVR in a SERF Atomic Magnetometer

Year: 2025

Type: article

Abstract: A stabilization method utilizing MEMS technology combined with a liquid crystal variable retarder (LCVR) was developed to enhance fiber laser output power stability and was applied to a spin-exchange relaxation-free (SERF) atomic magnetometer. Comparative experiments demonstrated that the unstabilized laser output exhibited 2.8% power fluctuations over a 500 s period, while the stabilized laser reduced this to 0.2%. Spectral density analysis confirmed suppressed frequency-domain fluctuations, indicating improved robustness against disturbances. Furthermore, the stabilized laser also reduced optical noise in SERF magnetometry, achieving a sensitivity of 19.2fT/Hz1/2. These results validate that the method optimizes both time- and frequency-domain performance, thereby advancing high-precision SERF magnetometry.

Source: Photonics

DOI: 10.3390/photonics12060573

Authors: Yitong Li, Wenfei Zhang, Jianqi Yang, Ying Liu, Yueyang Zhai

Institutions: Shandong University of Technology, Beihang University

Language: English

Topic: Atomic and Subatomic Physics Research

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funder: National Natural Science Foundation of China