Coherence-induced population redistribution in optical pumping

Y. Nafcha, M. Rosenbluh, P. Tremblay, C. Jacques

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We present experimental and theoretical investigations of the ground-state levels of the Cs cycling transition. We show that in such multilevel nondegenerate systems, the populations of the extreme Zeeman sublevels, under optical pumping, can have asymmetric (dispersive) line shapes as a function of laser frequency. A density-matrix model which takes into account optical, Zeeman, and hyperfine coherences, and allows for a fluctuating laser field, correctly predicts the experimental observations. A comparison of the density-matrix model with a rate-equation model demonstrates the role of coherences in the population distribution. Investigation of the effect theoretically and experimentally for and laser polarizations is presented in the paper.

Original languageEnglish
Pages (from-to)3216-3227
Number of pages12
JournalPhysical Review A
Volume52
Issue number4
DOIs
StatePublished - 1995

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