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Chin. Phys. B, 2015, Vol. 24(9): 094206    DOI: 10.1088/1674-1056/24/9/094206

Determination of the atomic density of rubidium-87

Zhao Meng, Zhang Kai, Chen Li-Qing
State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China
Abstract  Atomic density is a basic and important parameter in quantum optics, nonlinear optics, and precision measurement. In the past few decades, several methods have been used to measure atomic density, such as thermionic effect, optical absorption, and resonance fluorescence. The main error of these experiments stemmed from depopulation of the energy level, self-absorption, and the broad bandwidth of the laser. Here we demonstrate the atomic density of 87Rb vapor in paraffin coated cell between 297 K and 334 K mainly using fluorescence measurement. Optical pumping, anti-relaxation coating, and absorption compensation approaches are used to decrease measurement error. These measurement methods are suitable for vapor temperature at dozens of degrees. The fitting function for the experimental data of 87Rb atomic density is given.
Keywords:  atomic density      87Rb vapor      fluorescence      absorption compensation  
Received:  12 February 2015      Revised:  15 April 2015      Published:  05 September 2015
PACS:  42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)  
  42.30.Kq (Fourier optics)  
Fund: Project supported by the Natural Science Foundation of China (Grant Nos. 11274118 and 11474095), the Innovation Program of Shanghai Municipal Education Commission of China (Grant No. 13ZZ036), and the Fundamental Research Funds for the Central Universities of China.
Corresponding Authors:  Chen Li-Qing     E-mail:

Cite this article: 

Zhao Meng, Zhang Kai, Chen Li-Qing Determination of the atomic density of rubidium-87 2015 Chin. Phys. B 24 094206

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