Inversionless amplification and laser-induced transparency at the discrete transitions and the transitions to continuum
arXiv:quant-ph/0005108
Abstract
The effects of coherence of quantum transitions and the interference of resonant nonlinear optical processes on the spectra of absorption, amplification, and nonlinear-optical generation are considered. The most favorable conditions are discussed for the inversionless amplification, resonant refraction in the absence of absorption and for resonant enhancement of nonlinear-optical generation at the discrete transitions and the transitions to continuum.
Latex, 19 pages, 12 eps figures, invited review paper