中国物理B ›› 2023, Vol. 32 ›› Issue (2): 20602-020602.doi: 10.1088/1674-1056/ac8341

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In situ temperature measurement of vapor based on atomic speed selection

Lu Yu(于露)1, Li Cao(曹俐)1,†, Ziqian Yue(岳子骞)1, Lin Li(李林)1, and Yueyang Zhai(翟跃阳)2,‡   

  1. 1 School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China;
    2 Research Institute of Frontier Science, Beihang University, Beijing 100191, China
  • 收稿日期:2022-05-07 修回日期:2022-07-12 接受日期:2022-07-22 出版日期:2023-01-10 发布日期:2023-01-10
  • 通讯作者: Li Cao, Yueyang Zhai E-mail:caoli722@buaa.edu.cn;yueyangzhai@buaa.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61703025).

In situ temperature measurement of vapor based on atomic speed selection

Lu Yu(于露)1, Li Cao(曹俐)1,†, Ziqian Yue(岳子骞)1, Lin Li(李林)1, and Yueyang Zhai(翟跃阳)2,‡   

  1. 1 School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China;
    2 Research Institute of Frontier Science, Beihang University, Beijing 100191, China
  • Received:2022-05-07 Revised:2022-07-12 Accepted:2022-07-22 Online:2023-01-10 Published:2023-01-10
  • Contact: Li Cao, Yueyang Zhai E-mail:caoli722@buaa.edu.cn;yueyangzhai@buaa.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61703025).

摘要: We demonstrate an experimental method for the in situ temperature measurement of atomic vapor using the saturated absorption spectrum. By separately manipulating the frequency of the pump and probe beams, the position of the crossover peaks can move along the spectrum. Different velocity classes of atoms contribute to the crossover during the movement. We study the relationship between the intensity change of peaks and vapor temperature. Our experimental result around room temperature shows a deviation of less than 0.3 K. Compared with traditional thermometry using absorption spectroscopy, higher accuracy can theoretically be achieved with real-time thermometry.

关键词: temperature measurement, saturated absorption spectrum, Doppler broadening, atomic velocity distribution

Abstract: We demonstrate an experimental method for the in situ temperature measurement of atomic vapor using the saturated absorption spectrum. By separately manipulating the frequency of the pump and probe beams, the position of the crossover peaks can move along the spectrum. Different velocity classes of atoms contribute to the crossover during the movement. We study the relationship between the intensity change of peaks and vapor temperature. Our experimental result around room temperature shows a deviation of less than 0.3 K. Compared with traditional thermometry using absorption spectroscopy, higher accuracy can theoretically be achieved with real-time thermometry.

Key words: temperature measurement, saturated absorption spectrum, Doppler broadening, atomic velocity distribution

中图分类号:  (Measurements common to several branches of physics and astronomy)

  • 06.30.-k
42.55.-f (Lasers) 42.50.-p (Quantum optics) 43.28.Vd (Measurement methods and instrumentation to determine or evaluate Atmospheric parameters, winds, turbulence, temperatures, and pollutants in air)