Abstract
Light amplification without population inversion may be induced by optical coherence among the coupled slates driven by laser fields or by the difference between the absorption and emission paths manifested by quantum interference. The optical coherence and quantum interference may lead to interesting statistical properties, such as narrower intrinsic linewidths and amplitude squeezing in inversionless lasers with coherently pumped atomic systems as active media.
© 1994 Optical Society of America
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