Chinese Journal of Magnetic Resonance ›› 2016, Vol. 33 ›› Issue (1): 125-132.doi: 10.11938/cjmr20160112

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Spectrum Characteristics and Filtering Effect of 87Rb-Ar Spectrum Lamp

XU Feng1,2, HAO Qiang1,2, HE Sheng-guo1,2, MEI Gang-hua1   

  1. 1. Key Laboratory of Atomic Frequency Standard of the Chinese Academy of Sciences (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2015-04-07 Revised:2016-01-21 Online:2016-03-05 Published:2016-03-05

Abstract:

Via hyperfine spectral profile measurements, the spectrum characteristics and isotope filtering effect of the rubidium spectrum lamp were studied under the circumstance that both the lamp bulb and the filtering cell are filled with argon buffer gas. Spectral profile distortion of the 87Rb-Ar spectrum lamp was observed, and it was found that a lower temperature in the lamp bulb could minimize the distortion. The results also showed that the pressure, length and operation temperature of the filtering cell have evident influences on the filtering effect. After design and operation parameters being optimized, the spectrum lamp and the filtering cell were used in a rubidium frequency standard, and the short-term frequency stability was greatly improved.

Key words: rubidium frequency standards, rubidium spectrum lamp, rubidium filtering cell, isotope filtering, hyperfine spectrum

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