Nonlinear evolution of the locally induced modulational instability in fiber optics

Research output: Contribution to journalArticle


  • Adrien Kraych
  • Pierre Suret
  • Gennady El
  • Stéphane Randoux

External departments

  • Universite des Sciences et Technologies de Lille


Original languageEnglish
Article number054101
Number of pages6
JournalPhysical Review Letters
Issue number5
Early online date6 Feb 2019
Publication statusPublished - 8 Feb 2019
Publication type

Research output: Contribution to journalArticle


We report an optical fiber experiment in which we study nonlinear stage of modulational instability of a plane wave in the presence of a localized perturbation. Using a recirculating fiber loop as experimental platform, we show that the initial perturbation evolves into expanding nonlinear oscillatory structure exhibiting some universal characteristics that agree with theoretical predictions based on integrability properties of the focusing nonlinear Schr¨odinger equation. Our experimental results demonstrate persistence of the universal evolution scenario, even in the presence of small dissipation and noise in an experimental system that is not rigorously of an integrable nature.

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