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Limiting characteristic of superradiance

L. M. Biberman, А. И. Глейзер, Г. А. Кобзев

Published May 1, 1978• 0 citations
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Abstract

Relationships among the gain coefficient, radiation flux, and energy conversion coefficients, are studied theoretically for a gas undergoing superradiance.(AIP)

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Limiting characteristics of superradiance

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This paper augments previous theoretical descriptions of superradiance in an extended optically thick medium by giving expressions which limit the length and density of a high-gain system which can superradiate as a whole, or equivalently, the shortness of its output radiation pulses. Limits arising from experimental conditions such as finite inversion time, finite decay and dephasing times, finite transit time (cooperation length), feedback, diffraction, and Fresnel number not approximately one, are discussed. Modifications to the simple analytical expressions for the output radiation of the superradiant system due to each of these effects are described in detail. Detailed computer results are also given.