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OptSp

Coherent amplification of an ultrashort light pulse and the superradiance in impurity crystals upon selective excitation of an inhomogeneous profile

R. F. Malikov

Published Sep 1, 1998• 0 citations
OpenAlex

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The dynamics of the pulse shape and spectra of superfluorescence, stimulated superradiance, and coherent amplification of ultrashort light pulses is studied for a system of four-level atoms under incoherent cw pumping taking into account homogeneous and inhomogeneous broadening of the luminescence lines. It is found that incoherent pumping at a high level of excitation may significantly change the shape of the emission pulse in cooperative coherent processes. Also, it is found that, depending on the ratio of parameters of the pump, nonradiative transitions, and relaxation, different regimes of superfluorescence and stimulated superradiance may be realized.