Abstract
We address the dynamics characteristics of spatial solitons propagating through a longitudinal potential barrier in the framework of a nonlinear fractional Schrödinger equation. It is found that as the modulation depth of the potential increases, the output soliton will repeatedly encounter a unique process: soliton compression, soliton broadening, self-splitting, and soliton broadening. The channel width and number of emerging interval of the self-splitting propagation can also be tuned by varying the fractional Lévy index, the amplitude of the input beam, or the transverse modulation frequency. These obtained results may open up unique opportunities for beam propagation management and other applications in all-optical information devices.
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