中国物理B ›› 2026, Vol. 35 ›› Issue (6): 60703-060703.doi: 10.1088/1674-1056/ae07bf

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In-situ measurement of cell temperature by spin-relaxation rate analysis for an atomic magnetometer

Bing-Quan Zhao(赵丙权)1,2, Zhe Qi(祁喆)2,†, Jian-Long Wang(王建龙)2, Li-Hua Wu(武丽花)2, Qian-Yun Zhao(赵倩云)2, Jun-Xin Wei(韦俊新)2, Wei-Ren Liu(刘为任)2, and Ling-Xin Kong(孔令鑫)3,‡   

  1. 1 College of Intelligent Systems Science and Engineering, Harbin Engineering University, Harbin 150006, China;
    2 Tianjin Key Laboratory of Quantum Precision Measurement Technology, Tianjin Navigation and Instrument Institute, Tianjin 300131, China;
    3 Optical Fiber-Based Intelligent Sensing and Micromachines Laboratory, Yantai University, Yantai 264005, China
  • 收稿日期:2025-06-18 修回日期:2025-08-15 接受日期:2025-09-17 发布日期:2026-06-01
  • 通讯作者: Zhe Qi, Ling-Xin Kong E-mail:1120170088@mail.nankai.edu.cn;1120170096@mail.nankai.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 62105278), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2021QF139), and Qingchuang Technology Support Program of University in Shandong Province, China (Grant No. 2024KJG040).

In-situ measurement of cell temperature by spin-relaxation rate analysis for an atomic magnetometer

Bing-Quan Zhao(赵丙权)1,2, Zhe Qi(祁喆)2,†, Jian-Long Wang(王建龙)2, Li-Hua Wu(武丽花)2, Qian-Yun Zhao(赵倩云)2, Jun-Xin Wei(韦俊新)2, Wei-Ren Liu(刘为任)2, and Ling-Xin Kong(孔令鑫)3,‡   

  1. 1 College of Intelligent Systems Science and Engineering, Harbin Engineering University, Harbin 150006, China;
    2 Tianjin Key Laboratory of Quantum Precision Measurement Technology, Tianjin Navigation and Instrument Institute, Tianjin 300131, China;
    3 Optical Fiber-Based Intelligent Sensing and Micromachines Laboratory, Yantai University, Yantai 264005, China
  • Received:2025-06-18 Revised:2025-08-15 Accepted:2025-09-17 Published:2026-06-01
  • Contact: Zhe Qi, Ling-Xin Kong E-mail:1120170088@mail.nankai.edu.cn;1120170096@mail.nankai.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 62105278), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2021QF139), and Qingchuang Technology Support Program of University in Shandong Province, China (Grant No. 2024KJG040).

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摘要： Alkali-metal vapor cells are the core sensing components of atomic magnetometers. To achieve high-sensitivity magnetic field measurements, the cells require heating and stabilization at high temperatures. Here, we propose an in-situ temperature measurement method for a vapor cell of an atomic magnetometer based on spin-relaxation analysis. This technique establishes a direct functional correlation between the cell temperature and the spin-relaxation rate under low pumping power conditions. Experimental validation within the temperature range of 90 $^\circ$C-130 $^\circ$C confirms the accuracy of this approach. We further investigate the effects of magnetic fields on measurement precision and demonstrate the long-term, high-precision capabilities of temperature detection. This non-invasive technique presents a critical advantage for precise thermal optimization of atomic magnetometers.

关键词: atomic magnetometer, in-situ measurement, spin exchange, atomic number density

Abstract: Alkali-metal vapor cells are the core sensing components of atomic magnetometers. To achieve high-sensitivity magnetic field measurements, the cells require heating and stabilization at high temperatures. Here, we propose an in-situ temperature measurement method for a vapor cell of an atomic magnetometer based on spin-relaxation analysis. This technique establishes a direct functional correlation between the cell temperature and the spin-relaxation rate under low pumping power conditions. Experimental validation within the temperature range of 90 $^\circ$C-130 $^\circ$C confirms the accuracy of this approach. We further investigate the effects of magnetic fields on measurement precision and demonstrate the long-term, high-precision capabilities of temperature detection. This non-invasive technique presents a critical advantage for precise thermal optimization of atomic magnetometers.

Key words: atomic magnetometer, in-situ measurement, spin exchange, atomic number density

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) 33.35.+r (Electron resonance and relaxation)