Dynamics of Pearcey-Gaussian pulses in a multimode fiber

Abstract

Abstract We investigate the dynamics of Pearcey-Gaussian pulses propagating in a multimode fiber. By solving the nonlinear Schrodinger equation with the split-step Fourier-transform method, the propagation of Pearcey-Gaussian pulses in the multimode fiber is revealed. It shows an interesting phenomenon that under the combined action of second-order dispersion and third-order dispersion, multiple breathing solitons can form on the minor lobes of Pearcey-Gaussian pulses when the nonlinearity oscillates. Further, we study the evolution characteristics of the breathing solitons by changing the initial pulse power and oscillation frequency. It is found that the period and depth of breathing solitons can be manipulated by changing the initial pulse power and the oscillation frequency that are both limited to an appropriate range. Moreover, it also reveals that Pearcey-Gaussian pulses can compress the temporal width and form non-uniform breathing solitons under the action of second-order dispersion. By analyzing Pearcey-Gaussian pulses propagated in multimode fibers, our study gives a new method to understand complicated nonlinear dynamics in multimode fibers, contributing to applications of multimode lasers.