Paper

Effect of collisions on the shape of the coherent population trapping resonance detected by the Ramsey method

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© 2020 Kvantovaya Elektronika and IOP Publishing Limited
, , Citation G.V. Voloshin et al 2020 Quantum Electron. 50 1023 DOI 10.1070/QEL17064

1063-7818/50/11/1023

Abstract

We report on a theoretical model of the effect of coherent population trapping in alkali atoms in an optically thin gas cell with a buffer gas at a nonzero temperature in a pulsed laser field. The shape of the Ramsey resonance is analysed for two different temperature ranges, i. e. for a 'cold' atomic ensemble and for an ensemble of 'hot' atoms in a cell with a buffer gas. The influence of the hyperfine structure of the excited level on the shift of the central Ramsey resonance is investigated.

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10.1070/QEL17064