Stability of nonparaxial gap-soliton bullets in waveguide gratings

J. A.Ambassa Otsobo, L. Tiam Megne, C. B. Tabi, T. C. Kofané

Research output: Contribution to journalArticlepeer-review


We investigate the formation and propagation of gap-soliton bullets in nonlinear periodic waveguides at frequencies close to the gap for Bragg reflection beyond the paraxial approximation. Using a multiple-scales analysis, we derive a two-dimensional (2D) nonlinear Schrödinger equation with higher-order correction terms that consider the nonparaxial regimes in the slowly-varying envelope approximation. In addition, a fully numerical simulation of the newly derived model equation demonstrates that the mutual balancing between Kerr, dimensionality, higher-order dispersions and nonparaxiality allows shape-preserving propagation of gap-soliton bullets in a grating waveguide.

Original languageEnglish
Article number112034
JournalChaos, Solitons and Fractals
Publication statusPublished - May 2022

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • General Mathematics
  • General Physics and Astronomy
  • Applied Mathematics


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