Raman Dissipative Solitons

Abstract

AbstractIn this chapter, we give an overview of high-energy dissipative solitons generation via Raman gain. Such pulses have been proven to be a new kind of solitons—Raman dissipative soliton (RDS). Two basic configurations of the laser cavity with intra- and extra-cavity formation of the RDS are presented and the properties specific to each of them are discussed. Intra-cavity configuration provides a mutual coherence between the Raman and pump pulses generated in common cavity. Their mixing in a highly-nonlinear fiber results in cascaded generation of clones of the input DSs, forming a comb of highly chirped pulses in the spectral domain. Extra-cavity configuration gives more freedom in Raman cavity design, as net cavity dispersion together with the external pump pulse energy, duration and spectral width can be adjusted independently. As a result, it becomes possible to generate intensive laser radiation beyond the emission spectrum of typical active media, namely around 1.3 μm region, by using phosphosilicate fibers with the large Stokes shift. Thus, RDSs generation undoubtedly reveals new possibilities for numerous applications.KeywordsFiber lasersFemtosecond lasersUltrashort pulsesHighly-chirped pulsesRaman dissipative solitonStimulated Raman scatteringSynchronous pumpSpectral combPulse propagation