Experimental characterization of recurrences and separatrix crossing in modulational instability

Corentin Naveau , Pascal Szriftgiser (1) , Alexandre Kudlinski (1) , Matteo Conforti (2) , Stefano Trillo (3) , Arnaud Mussot (1)

1 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523
2 Dipartimento di Ingegneria de l'Informazione
3 Department of Engineering

We experimentally investigate two cycles of Fermi-Pasta-Ulam-Tsingou recurrence in optical fibers. Using three waves input we characterize the distance of maximum compression points against sideband amplitude and relative phase, outlining the qualitative changes of the dynamics due to separatrix crossing. Experimental results are in good agreement with numerical simulations and analytical predictions.

Domaines: Optique [physics.optics]; Optique / photonique; Science non linéaire [physics]

Corentin Naveau, Pascal Szriftgiser, Alexandre Kudlinski, Matteo Conforti, Stefano Trillo, et al.. Experimental characterization of recurrences and separatrix crossing in modulational instability. Optics Letters, 2019, 44 (22), pp.5426. ⟨10.1364/OL.44.005426⟩. ⟨hal-02384605⟩