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VOLUME 48 (1988) | ISSUE 11 | PAGE 581
Coherent amplification of an ultrashort pulse in a three-level medium without a population inversion
It is predicted that an ultrashort pulse in a three-level medium with Λ configuration will be amplified in the absence of a population inversion and coherent optical pumping. This effect occurs as a result of population capture in the two lower levels due to the excitation of the low-frequency coherence.