Broadband Dispersion-Managed Dissipative Soliton and Structural Soliton Molecules in a Slight-Normal Dispersion Fiber Laser

Abstract

We report on the generation of dispersion-managed dissipative soliton and various structural soliton molecules from a slight-normal dispersion fiber laser. The laser was capable of generating 56.5 nm broad dissipative solitons with quasi-rectangular spectral profile. Furthermore, the broadest top-flat spectrum with up to 71.4 nm bandwidth was achieved in the noise-like pulse regime, operating in the 1542-1613.4 nm. More importantly, by manipulating the laser cavity parameters, various types of soliton molecules, including conventional and unusual structural soliton molecules, were observed in fiber laser. The soliton molecules exhibit different features in autocorrelation traces, which are found to be related to soliton number, soliton intensity and soliton separation within the soliton molecules. The results contribute to enriching the soliton dynamics in the fiber lasers in the slight-normal dispersion regime.

Various‐order soliton molecule evolution in a fiber laser with nonlinear polarization rotation effect

“…6 Soliton molecules have been extensively investigated. [7][8][9][10][11][12][13][14][15][16][17][18][19] The nonlinear Schrodinger equation reveals the formation mechanism of soliton molecules: soliton molecules are formed by the repulsion and attraction of pulses, which is due to nonlinearity and dispersion effects. 20 Two soliton molecules with the same phase have attractive force, and those with opposite phases have repulsive force.…”

“…Malomed first theoretically predicted soliton molecules in 1991 6 . Soliton molecules have been extensively investigated 7–19 . The nonlinear Schrodinger equation reveals the formation mechanism of soliton molecules: soliton molecules are formed by the repulsion and attraction of pulses, which is due to nonlinearity and dispersion effects 20 .…”