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Quantum Sensing Metrology

Intensity nonlinearity of the error-signal frequency shift in the modulation spectroscopy of dark resonances and approaches to its reduction

arXiv
Authors: E. A. Tsygankov, S. V. Petropavlovsky, M. I. Vaskovskaya, D. S. Chuchelov, S. A. Zibrov, V. V. Vassiliev, V. L. Velichansky, V. P. Yakovlev

Year

2020

Paper ID

524

Status

Preprint

Abstract Read

~2 min

Abstract Words

102

Citations

N/A

Abstract

We have found that the error-signal frequency corresponding to the coherent population trapping resonance can be displaced from that of "0-0" transition unperturbed by the optical field, although the frequency is not sensitive to changes in its intensity. We consider the double Λ-system of levels interacting with the asymmetric polychromatic optical field to demonstrate that this effect arises due to intensity nonlinearity of the error-signal frequency shift. The experiment with 87Rb atoms in Ar-N2 buffer gas atomic cell shows how the displacement value depends on different parameters. The possible influence of the effect on the clocks' frequency stability and reproducibility are discussed.

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  • We have found that the error-signal frequency corresponding to the coherent population trapping resonance can be displaced from that of "0-0" transition unperturbed by the...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2012.13731 [2] arXiv https://arxiv.org/abs/2012.13731 [3] Publisher https://arxiv.org/abs/2012.13731

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