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Modulation induced frequency shifts in a CPT-based atomic clock

D. F. Phillips·I. Novikova·C. Y. -T. Wang·M. Crescimanno·R. L. Walsworth
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Abstract

We investigate systematic errors associated with a common modulation technique used for phase sensitive detection of a coherent population trapping (CPT) resonance. In particular, we show that modification of the CPT resonance lineshape due to the presence of off-resonant fields leads to frequency shifts which may limit the stability of CPT-based atomic clocks. We also demonstrate that an alternative demodulation technique greatly reduces these effects.

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D. F. Phillips, I. Novikova, C. Y. -T. Wang, M. Crescimanno, R. L. Walsworth. 2004-04-15. Modulation induced frequency shifts in a CPT-based atomic clock. https://doi.org/10.1364/josab.22.000305

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