Intrapulse Raman scattering and dissipative solitons with extreme spikes

Abstract

We have studied numerically the influence of intrapulse Raman scattering (IRS) on the dissipative solitons with extreme spikes (DSES). The following scenarios of the influence of IRS have been identified. In the anomalous dispersion regime, there has been found a transformation of the single spike DSES and pulsating in x and t DSES into Raman dissipative solitons. We should mention a good performance of the finite-dimensional system in the description of all pulse parameters in the first case. In the other scenario, the DSES moving with fixed velocity pulsating in x and t transforms into single spike DSES moving with fixed velocity. We have also observed a transformation of double spike DSES into single spike moving DSES as well as a transformation of a single spike DSES into a single spike moving DSES accompanied by the change in the period of the spikes appearance. In the normal dispersion regime, we have found a transformation of a single spike DSES into a single spike moving DSES and the change of the period of the spikes appearance. For a large strength of IRS, an appearance of a chaotic DSES has been observed.