Optical textures: characterizing spatiotemporal chaos.

  title={Optical textures: characterizing spatiotemporal chaos.},
  author={Marcel G. Clerc and Gregorio Gonzalez-Cortes and Vincent Odent and Mario Wilson},
  journal={Optics express},
  volume={24 14},
Macroscopic systems subjected to injection and dissipation of energy can exhibit complex spatiotemporal behaviors as result of dissipative self-organization. Here, we report a one- and two-dimensional pattern forming setup, which exhibits a transition from stationary patterns to spatiotemporal chaotic textures, based on a nematic liquid crystal layer with spatially modulated input beam and optical feedback. Using an adequate projection of spatiotemporal diagrams, we determine the largest… Expand
6 Citations
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Based on a liquid crystal light valve experiment with translational optical feedback, propagation, spatiotemporal intermittency, and defect turbulence of striped waves are observed and a local amplitude equation is derived close to the spatial instability. Expand
Stochastic resonance based on modulation instability in spatiotemporal chaos.
A novel dynamic of stochastic resonance in spatiotemporal chaos is presented, which is based on modulation instability of perturbed partially coherent wave and shows that through weakening the nonlinear threshold and triggering energy redistribution, the coherent component dominates the instability damped by incoherent component. Expand
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Front propagation transition induced by diffraction in a liquid crystal light valve
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This work investigates the transition from nonradiative to radiative oscillons in the parametrically driven sine-Gordon model in two spatial dimensions and shows the supercritical nature of this transition. Expand
Correlations between the leading Lyapunov vector and pattern defects for chaotic Rayleigh-Bénard convection.
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Experimental Spatiotemporal Chaotic Textures in a Liquid Crystal Light Valve with Optical Feedback
Macroscopic systems subjected to external forcing exhibit complex spatiotemporal behaviors as result of dissipative self-organization. Based on a nematic liquid crystal layer with spatially modulatedExpand
Spatiotemporal chaotic localized state in liquid crystal light valve experiments with optical feedback.
A simplified model is derived that allows for the unveiling of the front interaction mechanism at the origin of the localized spatiotemporal chaotic structures in a liquid crystal light valve experiment with optical feedback. Expand
Experimental evidence of chaotic itinerancy and spatiotemporal chaos in optics.
By increasing the Fresnel number F of a ring cavity with photorefractive gain, we show the transition between a low-F regime, where a few modes compete with a periodic alternation which becomesExpand
Emergence of spatiotemporal dislocation chains in drifting patterns.
The emergence of spatiotemporal dislocation chains is verified in numerical simulations on an optical feedback system with a non-uniform intensity pump and experimentally this phenomenon is observed in a tilted quasi-one-dimensional fluidized shallow granular bed mechanically driven by a harmonic vertical vibration. Expand
Chaoticon: localized pattern with permanent dynamics
This work considers a simple model—the Nagumo Kuramoto model—which contains the crucial ingredients for observing localized spatio-temporal chaotic pattern and its coexistence with a uniform state, and uncovers the front dynamics. Expand
Experimentally observed route to spatiotemporal chaos in an extended one-dimensional array of convective oscillators.
Experimental evidence of the route to spatiotemporal chaos in a large one-dimensional array of hotspots in a thermoconvective system is reported and a new instability takes place when the system is not able to sustain the spatial frequency splitting, although the temporal beating remains inside these domains. Expand
Transition to space-time chaos in an optical loop with translational transport.
The transition from regular patterns to space-time chaos in an optical system with nonlocal feedback is described and the different regimes are characterized both in terms of spatial and temporal correlation functions, and by means of a Kahrunen-Loeve decomposition. Expand
Transition from spirals to defect turbulence driven by a convective instability
SPATIAL and temporal order often arises in homogeneous systems driven away from equilibrium1. Sufficiently far from equilibrium, however, highly ordered behaviour typically degenerates intoExpand
Defects and spatiotemporal disorder in a pattern of falling liquid columns.
  • P. Brunet, L. Limat
  • Physics, Medicine
  • Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2004
Qualitatively, careful examinations of the global dynamics show that the contamination processes are nonlocal and involve the propagation of blocks of elementary laminar states emitted near the defects, which turn out to be essential ingredients of this self-sustained disorder. Expand
Quasiperiodicity route to spatiotemporal chaos in one-dimensional pattern-forming systems.
  • M. Clerc, N. Verschueren
  • Physics, Medicine
  • Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2013
A route to spatiotemporal chaos for one-dimensional stationary patterns is proposed, which is a natural extension of the quasiperiodicity route for low-dimensional chaos to extended systems and also from the larger Lyapunov exponents characterize the above instabilities. Expand