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Experimentally studying the scheme on exciting coherent population trapping resonances with lin//lin configuration

Yang Jing Liu Guo-Bin Gu Si-Hong

Experimentally studying the scheme on exciting coherent population trapping resonances with lin//lin configuration

Yang Jing, Liu Guo-Bin, Gu Si-Hong
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  • Received Date:  11 April 2011
  • Accepted Date:  23 May 2011
  • Published Online:  05 February 2012

Experimentally studying the scheme on exciting coherent population trapping resonances with lin//lin configuration

  • 1. Key Laboratory of Atomic Frequency Standards (KLAFS), Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China
Fund Project:  Project supported by the Special Fund for Basic Research on Scientific Instruments of the National Natural Science Foundation of China (Grant Nos.10927403).

Abstract: Coherent population trapping (CPT) atomic clocks are prevailingly realized by exciting CPT resonance with circularly polarized bichromatic coherent light (σ+-σ+ scheme), while atom utilization efficiency is relatively low in the scheme. For improving efficiency, we experimentally study the scheme of realizing CPT resonance through the interaction between atoms and parallel linearly polarized bichromatic coherent light field (lin//lin scheme). In the same experimental conditions the experimental results show that the signal-noise ratio of the CPT resonance signal is twice, and the differential slope is 1.65 time higher than those of σ+-σ+ scheme. The experimental results reveal that the scheme is an ideal candidate for low power consuming atomic clock and magnetometer.

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