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arXiv · 1710.10788

Observation of CPT for the ground hyperfine interval in $^{133}$Cs

Sumanta Khan·Vineet Bharti·Vasant Natarajan
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Abstract

We use the technique of coherent population trapping (CPT) to access the ground hyperfine interval (clock transition) in $^{133}$Cs. The probe and control beams required for CPT are obtained from a single compact diode laser system. The phase coherence between the beams, whose frequency difference is the clock frequency, is obtained by frequency modulating the laser with an electro-optic modulator (EOM). The EOM is fiber coupled and hence does not require alignment, and the atoms are contained in a vapor cell. Both of these should prove advantageous for potential use as atomic clocks in satellites.

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Sumanta Khan, Vineet Bharti, Vasant Natarajan. 2019-03-05. Observation of CPT for the ground hyperfine interval in $^{133}$Cs. https://arxiv.org/abs/1710.10788

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