Particularities of optical pumping effects in cold and ultra-slow beams of Na and Cs in the case of cyclic transitions
Efimov, D. K.
Bezuglov, N. N.
Chirtsov, A. S.
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AbstractThe time-dependent population dynamics of hyperfine (HF) levels of n2p3/2 states is examined for cyclic transitions in alkali atoms. We study a slow and cold atomic beam of Na (n = 3) and Cs (n = 6), taking into account the long interaction time of light with atoms (~200 μs) inside the resonant laser beam. Simple analytical expressions for the populations of the excited states and for the intensities of the absorption lines are derived for a three-level system model. We show that at moderate pump laser power the mixing of HF levels is sufficient to form a flow of population from a cyclic transition to partially open transitions. We discuss various phenomena associated with the evolution of optical pumping that cannot be explained by general analysis of two-level system model.
CitationBruvelis M, Cinins A, Leitis A, Efimov DK, Bezuglov NN, et al. (2015) Particularities of optical pumping effects in cold and ultra-slow beams of Na and Cs in the case of cyclic transitions. Opt Spectrosc 119: 1038–1048. Available: http://dx.doi.org/10.1134/S0030400X1512005X.
SponsorsThis work was supported by the Government of the Russian Federation Grant 074-U01, with partial funding from the European Commission projects EU FP7 IAPP COLDBEAM and EU FP7 Centre of Excellence FOTONIKA-LV (REGPOT-CT-2011-285912-FOTONIKA), and the US Office of Naval Research Grant No. N00014-12-1-0514.
PublisherPleiades Publishing Ltd
JournalOptics and Spectroscopy