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Observation of transient gain without population inversion in a laser-cooled rubidium lambda system

S. R. de Echaniz, Andrew D. Greentree, A. V. Durrant, D. M. Segal, J. P. Marangos, J. A. Vaccaro

quant-pharXiv:quant-ph/0105084

Abstract

We have observed clear Rabi oscillations of a weak probe in a strongly driven three-level lambda system in laser-cooled rubidium for the first time. When the coupling field is non-adiabatically switched on using a Pockels cell, transient probe gain without population inversion is obtained in the presence of uncoupled absorptions. Our results are supported by three-state computations.

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