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Izvestiya of Saratov University Physics

Resonant Self-Action and Non-Stationary Coherent Transients in Frequency-Modulated CW Laser Beams

Inna L. Plastun, Vladimir Leonardovich Derbov, A. V. Trofimov

Published Jan 1, 2008• 0 citations
Publisher

Abstract

ИЛ. Ппастун, В А. Дербов, А
DOI
10.18500/1817-3020-2008-8-1-59-62

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Self-action of a frequency-modulated laser beam, propagating through a two-level saturable absorber, is modeled numerically basing of the direct solution of Maxwell-Bloch equations. Following the common idea of spectroscopy, we plot the output intensity versus the input laser frequency that periodically changes in time. At modulation frequencies comparable with the relaxation rates the hysteresis loop is observed, i.e. the dependence of the transmitted intensity upon the instantaneous frequency depends on the direction of the frequency change. At large amplitudes of modulation coherent transient oscillations of the output intensity are observed.