Autors: Uzunov, I. M., Arabadzhiev, T. N., Nikolov, S. G. Title: Self-steepening and intrapulse Raman scattering in the presence of nonlinear gain and its saturation Keywords: Nonlinear fiber optics, complex cubic-quintic Ginzburg-Landau equation, dissipative solitons, intrapulse Raman scattering, self-steepening, mode-locked lasers Abstract: In this paper we present the results of a detailed numerical investigation of the influence of the self-steepening effect on the parameters of the Raman dissipative solitons in the presence of nonlinear gain and its saturation. It has been established that when the effect of self-steepening prevails under the intrapulse Raman scattering it leads to nonlinear changes in the parameters of the Raman dissipative solitons. Comparing the impact of the intrapulse Raman scattering and self-steepening in the presence of nonlinear gain and its saturation on the dissipative solitons, the following differences have been identified: a much slighter change of the amplitude in the presence of self-steepening; different types of nonlinear dependencies of the frequency and velocity in the presence of intrapulse Raman scattering; and a substantial increase of the velocity under the influence of self-steepening. We have found that under the influence of the saturation of the nonlinear gain the observed References Issue
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