Effect of optical pumping on alkali-atom Doppler-limited spectra

Thomas Lindvall, I. Tittonen

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

Using a three-level model and semiclassical density matrix formalism, we show that optical pumping influences both line positions and amplitudes in Doppler-broadened alkali-atom D1 and D2 spectra for intensities much lower than the two-level atom saturation intensity. The influence on the D2 spectrum is particularly interesting due to the presence of closed hyperfine transitions unaffected by optical pumping. This effect is of importance for example when lasers are frequency stabilized using linear absorption or when the alkali-atom vapour pressure is determined using absorption measurements.

Original languageEnglish
Pages (from-to)2779-2793
JournalJournal of Modern Optics
Volume54
Issue number18
DOIs
Publication statusPublished - 1 Dec 2007
MoE publication typeA1 Journal article-refereed

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optical pumping
alkalies
atoms
vapor pressure
formalism
saturation
lasers

Cite this

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Effect of optical pumping on alkali-atom Doppler-limited spectra. / Lindvall, Thomas; Tittonen, I.

In: Journal of Modern Optics, Vol. 54, No. 18, 01.12.2007, p. 2779-2793.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Tittonen, I.

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N2 - Using a three-level model and semiclassical density matrix formalism, we show that optical pumping influences both line positions and amplitudes in Doppler-broadened alkali-atom D1 and D2 spectra for intensities much lower than the two-level atom saturation intensity. The influence on the D2 spectrum is particularly interesting due to the presence of closed hyperfine transitions unaffected by optical pumping. This effect is of importance for example when lasers are frequency stabilized using linear absorption or when the alkali-atom vapour pressure is determined using absorption measurements.

AB - Using a three-level model and semiclassical density matrix formalism, we show that optical pumping influences both line positions and amplitudes in Doppler-broadened alkali-atom D1 and D2 spectra for intensities much lower than the two-level atom saturation intensity. The influence on the D2 spectrum is particularly interesting due to the presence of closed hyperfine transitions unaffected by optical pumping. This effect is of importance for example when lasers are frequency stabilized using linear absorption or when the alkali-atom vapour pressure is determined using absorption measurements.

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