Nonmagnetic VCSEL package and driver circuit for SERF atomic magnetometer

Kun Yang; Yingjie Cai; Zihan Xu; Tiedong Xu; Xiangyan Kong

doi:10.1117/12.2691289

28 July 2023 Nonmagnetic VCSEL package and driver circuit for SERF atomic magnetometer

Kun Yang, Yingjie Cai, Zihan Xu, Tiedong Xu, Xiangyan Kong

Proceedings Volume 12753, Second Conference on Biomedical Photonics and Cross-Fusion (BPC 2023); 1275309 (2023) https://doi.org/10.1117/12.2691289
Event: Second Conference on Biomedical Photonics and Cross-Fusion (BPC 2023), 2023, Shanghai, China

Abstract

SERF (Spin-exchange relaxation free) atomic magnetometers have been demonstrated as the ultra-high sensitive, noncryogenic sensor. Single-beam configured sensors often choose VCSEL (Vertical-Cavity Surface-Emitting Laser) as the optical source. The existing commercial VCSELs are often with magnetic package and heater, which will affect the sensitivity of atomic magnetometers. In our work, we presented a novel nonmagnetic VCSEL package and its driver circuit. VCSEL chip, heater, and PT1000 are assembled on FPC (Flexible Printed Circuit), and its driver are optimized in terms of low noise, safe protection and AC temperature control. The result showed that the magnetic field generated by heating current can be ignored based on proposed layout method, and the RMS noise of current and temperature are lower than 0.1 µA and 20 mK, respectively. Our proposed method will expand the possibility for commercialization process of miniature SERF atomic magnetometers.

Citation Download Citation

Kun Yang, Yingjie Cai, Zihan Xu, Tiedong Xu, and Xiangyan Kong "Nonmagnetic VCSEL package and driver circuit for SERF atomic magnetometer", Proc. SPIE 12753, Second Conference on Biomedical Photonics and Cross-Fusion (BPC 2023), 1275309 (28 July 2023); https://doi.org/10.1117/12.2691289

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