Suppression of the vapor cell temperature error in a spin-exchange relaxation-free comagnetometer

doi:10.1088/1674-1056/ad84ce

中国物理B ›› 2024, Vol. 33 ›› Issue (12): 120701-120701.doi: 10.1088/1674-1056/ad84ce

Suppression of the vapor cell temperature error in a spin-exchange relaxation-free comagnetometer

Jia-Li Liu(刘佳丽)¹, Li-Wei Jiang(姜丽伟)^2,3,†, Chi Fang(方驰)^2,3, Xin Zhao(赵鑫)¹, and Yuan-Qiang Chen(陈远强)¹

1 National Institute of Extremely-Weak Magnetic Field Infrastructure, Hangzhou 310051, China;
2 Institute of Large-scale Scientific Facility and Centre for Zero Magnetic Field Science, Beihang University, Beijing 100191, China;
3 Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, China

收稿日期:2024-08-01 修回日期:2024-09-12 接受日期:2024-10-09 发布日期:2024-11-26
通讯作者: Li-Wei Jiang E-mail:jiangliwei@buaa.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 62103024 and 61925301), and in part by the Aeronautical Science Foundation (Grant No. 2023Z073051012).

Suppression of the vapor cell temperature error in a spin-exchange relaxation-free comagnetometer

Jia-Li Liu(刘佳丽)¹, Li-Wei Jiang(姜丽伟)^2,3,†, Chi Fang(方驰)^2,3, Xin Zhao(赵鑫)¹, and Yuan-Qiang Chen(陈远强)¹

1 National Institute of Extremely-Weak Magnetic Field Infrastructure, Hangzhou 310051, China;
2 Institute of Large-scale Scientific Facility and Centre for Zero Magnetic Field Science, Beihang University, Beijing 100191, China;
3 Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology, Hangzhou Innovation Institute, Beihang University, Hangzhou 310051, China

Received:2024-08-01 Revised:2024-09-12 Accepted:2024-10-09 Published:2024-11-26
Contact: Li-Wei Jiang E-mail:jiangliwei@buaa.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 62103024 and 61925301), and in part by the Aeronautical Science Foundation (Grant No. 2023Z073051012).

摘要/Abstract

摘要： The fluctuation of the vapor cell temperature leads to the variations of the density of the alkali metal atoms, which seriously damages the long-term stability of the spin-exchange relaxation-free (SERF) comagnetometer. To address this problem, we propose a novel method for suppressing the cell temperature error by manipulating the probe laser frequency. A temperature coefficient model of the SERF comagnetometer is established based on the steady-state response, which indicates that the comagnetometer can be tuned to a working point where the output signal is insensitive to the cell temperature fluctuation, and the working point is determined by the relaxation rate of the alkali metal atoms. The method is verified in a K-Rb-²¹Ne comagnetometer, and the experimental results are consistent with the theory. The theory and method presented here lay a foundation for the practical applications of the SERF comagnetometer.

关键词: spin-exchange relaxation-free, atomic comagnetometer, cell temperature error, probe laser frequency

Abstract: The fluctuation of the vapor cell temperature leads to the variations of the density of the alkali metal atoms, which seriously damages the long-term stability of the spin-exchange relaxation-free (SERF) comagnetometer. To address this problem, we propose a novel method for suppressing the cell temperature error by manipulating the probe laser frequency. A temperature coefficient model of the SERF comagnetometer is established based on the steady-state response, which indicates that the comagnetometer can be tuned to a working point where the output signal is insensitive to the cell temperature fluctuation, and the working point is determined by the relaxation rate of the alkali metal atoms. The method is verified in a K-Rb-²¹Ne comagnetometer, and the experimental results are consistent with the theory. The theory and method presented here lay a foundation for the practical applications of the SERF comagnetometer.

Key words: spin-exchange relaxation-free, atomic comagnetometer, cell temperature error, probe laser frequency

中图分类号: (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)

07.07.Df

07.55.Ge (Magnetometers for magnetic field measurements) 42.79.-e (Optical elements, devices, and systems)

Jia-Li Liu(刘佳丽), Li-Wei Jiang(姜丽伟), Chi Fang(方驰), Xin Zhao(赵鑫), and Yuan-Qiang Chen(陈远强). Suppression of the vapor cell temperature error in a spin-exchange relaxation-free comagnetometer[J]. 中国物理B, 2024, 33(12): 120701-120701.

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Suppression of the vapor cell temperature error in a spin-exchange relaxation-free comagnetometer

Suppression of the vapor cell temperature error in a spin-exchange relaxation-free comagnetometer

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