Performance optimization of a SERF atomic magnetometer based on flat-top light beam

doi:10.1088/1674-1056/ad401b

中国物理B ›› 2024, Vol. 33 ›› Issue (6): 60703-060703.doi: 10.1088/1674-1056/ad401b

Performance optimization of a SERF atomic magnetometer based on flat-top light beam

Ziqi Yuan(袁子琪)¹, Junjian Tang(唐钧剑)^1,2,†, Shudong Lin(林树东)¹, and Yueyang Zhai(翟跃阳)^1,2,3

1 Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China;
2 School of Physics, Beihang University, Beijing 100191, China;
3 Hefei National Laboratory, Hefei 230088, China

收稿日期:2024-03-04 修回日期:2024-04-12 接受日期:2024-04-18 出版日期:2024-06-18 发布日期:2024-06-18
通讯作者: Junjian Tang E-mail:tangjunjian@buaa.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 62303029), the China Postdoctoral Science Foundation (Grant No. 2022M720364), and the Innovation Program for Quantum Science and Technology (Grant Nos. 2021ZD0300500 and 2021ZD0300503).

Performance optimization of a SERF atomic magnetometer based on flat-top light beam

Ziqi Yuan(袁子琪)¹, Junjian Tang(唐钧剑)^1,2,†, Shudong Lin(林树东)¹, and Yueyang Zhai(翟跃阳)^1,2,3

1 Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China;
2 School of Physics, Beihang University, Beijing 100191, China;
3 Hefei National Laboratory, Hefei 230088, China

Received:2024-03-04 Revised:2024-04-12 Accepted:2024-04-18 Online:2024-06-18 Published:2024-06-18
Contact: Junjian Tang E-mail:tangjunjian@buaa.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 62303029), the China Postdoctoral Science Foundation (Grant No. 2022M720364), and the Innovation Program for Quantum Science and Technology (Grant Nos. 2021ZD0300500 and 2021ZD0300503).

摘要/Abstract

摘要： We explore the impact of pumping beams with different transverse intensity profiles on the performance of the spin-exchange relaxation-free (SERF) atomic magnetometers (AMs). We conduct experiments comparing the traditional Gaussian optically-pumped AM with that utilizing the flat-top optically-pumped (FTOP) method. Our findings reveal that the FTOP-based approach outperforms the conventional method, exhibiting a larger response, a narrower magnetic resonance linewidth, and a superior low-frequency noise performance. Specifically, the use of FTOP method leads to a 16% enhancement in average sensitivity within 1Hz-30Hz frequency range. Our research emphasizes the significance of achieving transverse polarization uniformity in AMs, providing insights for future optimization efforts and sensitivity improvements in miniaturized magnetometers.

关键词: atomic magnetometer (AM), spin-exchange relaxation-free (SERF), flat-top light beam, performance optimization

Abstract: We explore the impact of pumping beams with different transverse intensity profiles on the performance of the spin-exchange relaxation-free (SERF) atomic magnetometers (AMs). We conduct experiments comparing the traditional Gaussian optically-pumped AM with that utilizing the flat-top optically-pumped (FTOP) method. Our findings reveal that the FTOP-based approach outperforms the conventional method, exhibiting a larger response, a narrower magnetic resonance linewidth, and a superior low-frequency noise performance. Specifically, the use of FTOP method leads to a 16% enhancement in average sensitivity within 1Hz-30Hz frequency range. Our research emphasizes the significance of achieving transverse polarization uniformity in AMs, providing insights for future optimization efforts and sensitivity improvements in miniaturized magnetometers.

Key words: atomic magnetometer (AM), spin-exchange relaxation-free (SERF), flat-top light beam, performance optimization

中图分类号: (Magnetometers for magnetic field measurements)

07.55.Ge

07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing) 33.80.-b (Photon interactions with molecules)

Ziqi Yuan(袁子琪), Junjian Tang(唐钧剑), Shudong Lin(林树东), and Yueyang Zhai(翟跃阳). Performance optimization of a SERF atomic magnetometer based on flat-top light beam[J]. 中国物理B, 2024, 33(6): 60703-060703.

Ziqi Yuan(袁子琪), Junjian Tang(唐钧剑), Shudong Lin(林树东), and Yueyang Zhai(翟跃阳). Performance optimization of a SERF atomic magnetometer based on flat-top light beam[J]. Chin. Phys. B, 2024, 33(6): 60703-060703.

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Performance optimization of a SERF atomic magnetometer based on flat-top light beam

Performance optimization of a SERF atomic magnetometer based on flat-top light beam

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