Abstract

We discuss the effects of population pulsations on the spectral response of backward nearly degenerate four-wave mixing (NDFWM). We include the effects of state-specific decay and spontaneous emission on both two-level and inverted-v-type three-level systems. We compare the results with experiments in both the gas phase and the condensed phase that show ultranarrow resonances. In addition, we examine the response in the presence of strong pump fields. We show that in a simple two-level system, the NDFWM response results in an ac-Stark splitting of the spectral response, whereas in a simple three-level system with decay to a metastable state, a single narrow resonance is observed, which broadens in the presence of strong pumps.

© 1988 Optical Society of America

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