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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, 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 |
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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.
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Received: 04 March 2024
Revised: 12 April 2024
Accepted manuscript online: 18 April 2024
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PACS:
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07.55.Ge
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(Magnetometers for magnetic field measurements)
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07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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33.80.-b
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(Photon interactions with molecules)
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| 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
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Cite this article:
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 2024 Chin. Phys. B 33 060703
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