Localized versus delocalized patterns in a nonlinear optical interferometer

Year: 2000

Authors: Ramazza PL., Ducci S., Boccaletti S., Arecchi F.T.

Autors Affiliation: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze; INFM, Sez Firenze; Univ Florence, Dept Phys; Univ Navarra, Dept Appl Math & Phys., Pampalona , Spain

Abstract: We compare the morphology of the spatial structures displayed by an optical system consisting of a liquid crystal light valve (LCLV) in a feedback configuration, as the feedback is gradually tuned from purely diffractive to mixed interferential and diffractive. Different kinds of spatially coherent structures (e.g. hexagons, rolls), as well as localized structures and space-time turbulent patterns are observed. The features of the localized structures change with the parameter setting, and certain regions of the parameter space provide stable clusters of isolated spots (‘molecules’). Numerical simulations based on a Kerr-like model of the LCLV are in agreement with the experimental observations. We analyse the links between the observed behaviours and the results of a linear-stability analysis of the underlying homogeneous stationary states.

Journal/Review: JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS

Volume: 2 (3)      Pages from: 399  to: 405

KeyWords: nonlinear optics; pattern formation; liquid crystal light valve
DOI: 10.1088/1464-4266/2/3/329

ImpactFactor: 0.598
Citations: 54
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