Inversionless amplification in a three-level medium.
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We study all possible resonant three-level configurations where a low-frequency coherent pump can be converted into a high-frequency field in the absence of population inversion at both atomic high-frequency transitions. We identify two different mechanisms that provide such inversionless amplification. © 1992 The American Physical Society.
author list (cited authors)
Kocharovskaya, O., Mandel, P., & Radeonychev, Y. V
complete list of authors
Kocharovskaya, O||Mandel, P||Radeonychev, YV