Particularities of Optical Pumping Effects in Cold and Ultra-Slow Beams of Na and Cs in the Case of Cyclic Transitions

M. Bruvelis, A. Cinins, A. Leitis, D. K. Efimov, N. N. Bezuglov, A. S. Chirtsov, F. Fuso, A. Ekers

Research output

2 Citations (Scopus)

Abstract

The time-dependent population dynamics of hyperfine (HF) levels of n 2 p 3/2 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.
Original languageEnglish
Number of pages11
JournalOptics and Spectroscopy (English translation of Optika i Spektroskopiya)
Volume119
Issue number6
DOIs
Publication statusPublished - 2015

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Optical pumping
optical pumping
Atomic beams
Atoms
Population dynamics
Alkalies
Excited states
Laser beams
Pumps
Lasers
atomic beams
atoms
alkalies
laser beams
pumps
excitation
lasers
interactions

Cite this

@article{3009996d92754be5b1016b2959609a4c,
title = "Particularities of Optical Pumping Effects in Cold and Ultra-Slow Beams of Na and Cs in the Case of Cyclic Transitions",
abstract = "The time-dependent population dynamics of hyperfine (HF) levels of n 2 p 3/2 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.",
author = "M. Bruvelis and A. Cinins and A. Leitis and Efimov, {D. K.} and Bezuglov, {N. N.} and Chirtsov, {A. S.} and F. Fuso and A. Ekers",
year = "2015",
doi = "10.1134/S0030400X1512005X",
language = "English",
volume = "119",
journal = "OPTICS AND SPECTROSCOPY",
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publisher = "Pleiades Publishing",
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TY - JOUR

T1 - Particularities of Optical Pumping Effects in Cold and Ultra-Slow Beams of Na and Cs in the Case of Cyclic Transitions

AU - Bruvelis, M.

AU - Cinins, A.

AU - Leitis, A.

AU - Efimov, D. K.

AU - Bezuglov, N. N.

AU - Chirtsov, A. S.

AU - Fuso, F.

AU - Ekers, A.

PY - 2015

Y1 - 2015

N2 - The time-dependent population dynamics of hyperfine (HF) levels of n 2 p 3/2 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.

AB - The time-dependent population dynamics of hyperfine (HF) levels of n 2 p 3/2 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.

U2 - 10.1134/S0030400X1512005X

DO - 10.1134/S0030400X1512005X

M3 - Article

VL - 119

JO - OPTICS AND SPECTROSCOPY

JF - OPTICS AND SPECTROSCOPY

SN - 0030-400X

IS - 6

ER -