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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Modeling of gamma-pulse propagation in the optical thick medium with inverted population of the nuclear levels of 178 HF isotope

E. A. Popov, Самарцев Виталий Владимирович, Eugene A. Yanvarev, Valery Valentinovich Kosulin, R. V. Osikov

Published Apr 20, 2004• 0 citations
Publisher

Abstract

The nuclear superfluorescence in the “optical” medium with 178Hf in propagation channel has been modeled. The general equations system describing the nuclear superfluorescence in the “optical” medium has obtained. The numerical simulation in the propagation channel in the “optical” thick medium with 178Hf has been made.
DOI
10.1117/12.562202

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An analysis is made of the conditions for the generation of superfluorescence pulses in an inverted medium of electron—hole pairs in a semiconductor. It is shown that strong optical amplification in laser semiconductor amplifiers characterised by α L ≫ 1 (α is the small-signal gain and L is the amplifier length) leads to suppression of phase relaxation of the medium during the initial stages of evolution of superfluorescence and to formation of a macroscopic dipole from electron—hole pairs. Cooperative emission of radiation in this system results in generation of a powerful ultrashort pulse of the optical gain, which interacts coherently with the semiconductor medium. It is shown that coherent pulsations of the optical field, observed earlier by the author in Q -switched semiconductor lasers, are the result of superfluorescence and of the coherent interaction between the optical field and the medium.
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