Multiple solitons grouping in fiber lasers by dispersion management and nonlinearity control

Dispersion-managed bound solitons and soliton bunches have been studied experimentally in a fiber laser mode-locked by saturable absorber with biexponential recovery dynamics, which enforces strongly the soliton interaction. The excessive nonlinearity and dispersion in a cavity was found to provoke the collapse of bound solitons states and induce the irregular soliton dynamics, which indicates the random relative phase variations between the solitons caused by the dispersive wave.