Experimental evidence of absolute and convective instabilities in optics

Authors :: Majid Taki
Christophe Szwaj
Eric Louvergneaux
Gonzague Agez
Pierre Glorieux
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM)
Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Source :: Scopus-Elsevier, Physical Review Letters, Physical Review Letters, 2004, 92 (4), pp.043901. ⟨10.1103/PhysRevLett.92.043901⟩, Physical Review Letters, American Physical Society, 2004, 92 (4), pp.043901. ⟨10.1103/PhysRevLett.92.043901⟩
Publication Year :: 2003
Abstract: International audience; Experimental evidence of convective and absolute instabilities in a nonlinear optical system is given. In optics, the presence of spatial nonuniformities brings in additional complexity. Hence, signatures characterizing these two regimes are derived based on analytical and numerical investigations. The corresponding noise-sustained and dynamical patterns are observed experimentally in a liquid crystal layer subjected to a laser beam with tilted feedback.