Finding spatiotemporal light bullets in multicore and multimode fibers

A two-level iterative algorithm for finding stationary solutions of coupled nonlinear Schrodinger equations describing the propagation dynamics of an electromagnetic pulse in multimode and multicore optical fibers of various structures was developed and tested. Using as an example the proposed analytical soliton solution which is localized in space and time, test calculations were performed, and the convergence of the algorithm was demonstrated. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement