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Influence of an initial excitation of a medium on transient stimulated Raman scattering of light

Simple analytic solutions, obtained for the energy density of the amplified radiation, are used to analyse the influence of various types of excitation of a medium on the processes of essentially transient stimulated Raman scattering and inverse Raman scattering in a powerful laser radiation field. It is shown that the excitation may alter the nature of amplification and may also reveal the initial ratio of the phases of the interacting waves.