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Optics and Spectroscopy

Stimulated Raman scattering of nonmonochromatic radiation in a medium with spontaneous scattering line of arbitrary shape

Guerman A. Pasmanik

Published Apr 1, 1975• 0 citations
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An analysis is made of nonlinear nonstationary equations describing dynamics of the stimulated Raman scattering in optical resonators excited by external nonmonochromatic radiation. The threshold of the excitation of the stimulated scattering by nonmonochromatic radiation is found and its dependence on the dispersion of the active medium is deduced. Solutions are obtained for steady-state oscillations in a resonator and their characteristics are investigated as a function of the spectrum of the exciting radiation and of the dispersion of the active medium.
A theory is developed of stimulated scattering of nonmonochromatic radiation whose spectral width is much greater than the spontaneous scattering line width or the frequency shift of the Stokes wave. It is shown that scattering of nonmonochromatic incident radiation under coherent conditions may take place as efficiently as for monochromatic pump radiation. The results apply to various types of stimulated scattering, in particular, to stimulated thermal scattering and stimulated scattering in media which are in thermodynamic nonequilibrium.