Modeling of the effects of intrapulse Raman scattering on dissipative solitons in a mode-locked fiber laser.

Abstract

The effects of intrapulse Raman scattering (IRS) on dissipative solitons in a mode-locked fiber laser are studied numerically. This research contributes to understanding the impact of IRS on the stability of pulsating soliton solutions of the complex cubic-quintic Ginzburg-Landau equation (in the anomalous dispersion region). It is found that IRS causes an additional loss on the pulse and leads to balance between dissipative effects to generate stable dissipative solitons. The regions of parameters where stationary, pulsating, and chaotic solitons are generated are depicted considering IRS and without it. Regarding the results, the region of the existence of stable solitons becomes larger in the presence of IRS. There is an important trade-off between output pulse energy and laser stability by increasing the IRS parameter. IRS can transform pulsating solitons into stable solitons for a wide range of parameter values. However, the pulse energy is reduced. The bifurcation diagram shows that period doubling and period quadrupling do not occur in the presence of IRS.