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Auto-modulation versus breathers in the nonlinear stage of modulational instability
preprintposted on 2023-11-30, 06:11 authored by Matteo Conforti, Sitai Li, Gino Biondini, Stefano Trillo
The nonlinear stage of modulational instability in optical fibers induced by a wide and easily accessible class of localized perturbations is studied using the nonlinear Schrodinger equation. It is showed that the development of associated spatio-temporal patterns is strongly affected by the shape and the parameters of the perturbation. Different scenarios are presented that involve an auto-modulation developing in a characteristic wedge, possibly coexisting with breathers which lie inside or outside the wedge.