RAMSEY EFFECT IN OPTICALLY THICK RESONANCE MEDIUM

Abstract

A Ramsey resonance with narrowed lines is experimentally discovered in an optically thick two level atomic medium. We show that the formation of the narrowed lines is caused by the effects of multiple photon echo signals originating in the depths of the optically thick atomic medium, which is also confirmed by the observation of these signals at the medium output. The analytical solutions obtained using the pulse area theorem and its generalization to photon echo together with the inverse scattering method well describe the main patterns of the processes under consideration and spectroscopic parameters of Ramsey resonances.