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Chin. Phys. B, 2017, Vol. 26(6): 067801    DOI: 10.1088/1674-1056/26/6/077801

Combined effect of light intensity and temperature on the magnetic resonance linewidth in alkali vapor cell with buffer gas

Yang Gao(高阳)1, Hai-Feng Dong(董海峰)1, Xiang Wang(王翔)2, Xiao-Fei Wang(王笑菲)1, Ling-Xiao Yin(尹凌霄)1
1 School of Instrumentation Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China;
2 School of Electronic and Information Engineering, Beihang University, Beijing 100191, China

One of the peculiar phenomenons in non-zero magnetic resonance magnetometer is that, with the increase of the temperature, the magnetic resonance linewidth is narrowed at first instead of broadened due to the increasing collision rate. The magnetometer usually operates at the narrowest linewidth temperature to obtain the best sensitivity. Here, we explain this phenomenon quantitatively considering the nonlinear of the optical pumping in the cell and did experiments to verify this explanation. The magnetic resonance linewidth is measured using one amplitude-modulated pump laser and one continuous probe laser. The field is along the direction orthogonal to the plane of pump and probe beams. We change the temperature from 53℃ to 93℃ and the pumping light from 0.1 mW to 2 mW. The experimental results agree well with the theoretical calculations.

Keywords:  atomic magnetometer      magnetic resonance      linewidth      temperature  
Received:  11 February 2017      Revised:  29 March 2017      Accepted manuscript online: 
PACS:  78.20.Ls (Magneto-optical effects)  
  85.70.Sq (Magnetooptical devices)  
  33.57.+c (Magneto-optical and electro-optical spectra and effects)  

Project supported by the National Natural Science Foundation of China (Grant Nos. 51675034 and 61273067) and Beijing Natural Science Foundation (Grant No. 7172123).

Corresponding Authors:  Hai-Feng Dong     E-mail:

Cite this article: 

Yang Gao(高阳), Hai-Feng Dong(董海峰), Xiang Wang(王翔), Xiao-Fei Wang(王笑菲), Ling-Xiao Yin(尹凌霄) Combined effect of light intensity and temperature on the magnetic resonance linewidth in alkali vapor cell with buffer gas 2017 Chin. Phys. B 26 067801

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