Abstract
Superadiation (SR) of an inverted two-level medium, described by one-dimensional Maxwell-Bloch equations without assuming that the amplitudes of the electric field vary smoothly along the sample, is studied. It is shown that as the initial inversion density increases, a transition is observed from the so-called “lethargic” field amplification regime, characteristic for the initial stage of SR, to a regime close to the ordinary exponential law. This accelerates the process and can lead to synchronization of counterpropagating SR pulses. Estimates are obtained for the average value of the delays of the oppositely propagating pulses and for their correlation criterion, which depends strongly on the ratio of the sample length and the half-wavelength of the resonance radiation. The possibility of realizing SR under conditions of strong phase relaxation of the active medium is discussed.
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Pis’ma Zh. Tekh. Fiz. 25, 24–31 (October 12, 1999)
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Avetisyan, Y.A. The effect of internal reflections of the field on the parameters of a superradiant pulse. Tech. Phys. Lett. 25, 769–771 (1999). https://doi.org/10.1134/1.1262629
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DOI: https://doi.org/10.1134/1.1262629