Contemporary Physics · 1993 · 138 citations · 75 references
Natural SciencesPhysicsOpticsOptoelectronicsPhotonicsLaser OpticsLaser PhysicsNonlinear OpticsOptical AmplifiersSemiconductor LasersSignal AmplificationGain SaturationLaser AmplificationLaser AmplifiersLaser ThresholdOptical AmplificationOptical Gain In SemiconductorsOptical Signal AmplificationPopulation Inversion In Semiconductor Lasers
Abstract The historical development that led to the modern concept of amplification and losing without inversion is reviewed. The two basic mechanisms for amplification without inversion and their theoretical formulation are discussed. Finally, the three experiments that confirm the occurrence of these effects are described.
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Effects of Configuration Interaction on Intensities and Phase Shifts
U. Fano · Physical Review · 1961 · 11.1K citations
Spectral Distribution of Atomic Oscillator Strengths
U. Fano, J. Cooper · Reviews of Modern Physics · 1968 · 1.8K citations