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Chin. Phys. B, 2024, Vol. 33(6): 060703    DOI: 10.1088/1674-1056/ad401b
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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, andYueyang 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
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 1 Hz-30 Hz 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.
Keywords:  atomic magnetometer (AM)      spin-exchange relaxation-free (SERF)      flat-top light beam      performance optimization  
Received:  04 March 2024      Revised:  12 April 2024      Accepted manuscript online:  18 April 2024
PACS:  07.55.Ge (Magnetometers for magnetic field measurements)  
  07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)  
  33.80.-b (Photon interactions with molecules)  
Fund: 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).
Corresponding Authors:  Junjian Tang     E-mail:  tangjunjian@buaa.edu.cn

Cite this article: 

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

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