title: Advection-induced spectrotemporal defects in a free-electron laser.
abstract: We evidence numerically and experimentally that advection can induce spectrotemporal defects in a system presenting a localized structure. Those defects in the spectrum are associated with the breakings induced by the drift of the localized solution. The results are based on simulations and experiments performed on the super-ACO free-electron laser. However, we show that this instability can be generalized using a real Ginzburg-Landau equation with (i) advection and (ii) a finite-size supercritical region.
authors.affiliation: Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523, Centre d'Etudes et de Recherches Lasers et Applications, FR CNRS 2416, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq Cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Bielawski
authors.forename: C
authors.initials: C
authors.lastname: Szwaj
authors.forename: C
authors.initials: C
authors.lastname: Bruni
authors.forename: D
authors.initials: D
authors.lastname: Garzella
authors.forename: G L
authors.initials: GL
authors.lastname: Orlandi
authors.forename: M E
authors.initials: ME
authors.lastname: Couprie