Eckhaus instability in the Lugiato-Lefever model

  • Nicolas Périnet
  • Nicolas Verschueren
  • Saliya Coulibaly
Regular Article
Part of the following topical collections:
  1. Topical Issue: Theory and applications of the Lugiato-Lefever Equation

Abstract

We study theoretically the primary and secondary instabilities undergone by the stationary periodic patterns in the Lugiato-Lefever equation in the focusing regime. Direct numerical simulations in a one-dimensional periodic domain show discrete changes of the periodicity of the patterns emerging from unstable homogeneous steady states. Through continuation methods of the steady states we reveal that the system exhibits a set of wave instability branches. The organisation of these branches suggests the existence of an Eckhaus scenario, which is characterized in detail by means of the derivation of their amplitude equation in the weakly nonlinear regime. The continuation in the highly nonlinear regime shows that the furthest branches become unstable through a Hopf bifurcation.

Graphical abstract

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Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Departamento de Física, Facultad de ciencias Físicas y Matemáticas, Universidad de ChileSantiagoChile
  2. 2.Department of Engineering MathematicsUniversity of Bristol, Queen’s Building, University WalkBristolUK
  3. 3.Laboratoire de Physique des Lasers, Atomes et Molecules, CNRS UMR 8523, Université des Sciences et Technologies de LilleVilleneuve d’Ascq CedexFrance

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