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ACOFT/ACOLS 2009, Sub Conference Dissipative Soliton (DS.2009), Adelaide : Australie (2009)

Noise-sustained dynamics of drifting patterns in a tilted nonlinear feedback system

Nicolas Marsal 1, Delphine Wolfersberger 1, Marc Sciamanna 1, Germano Montemezzani 1

(29/11/2009)

We investigate experimentally the dynamics of pattern excitation in presence of an advection-like effect in a nonlinear optical system. This advection effect, created when the angle of incidence of the pump beam is not zero, causes the existence of: (i) a transition from convective to absolute instabilities, (ii) the formation of new pattern geometries, (iii) the seeding of noise-sustained structures. All these phenomena, previously observed in nonlinear Kerr-type systems, are demonstrated in our setup composed by a photorefractive nonlinear medium in a tilted feedback configuration.

1 :	Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS)
	CNRS : UMR7132 – Université Paul Verlaine - Metz – SUPELEC

Domaine

:

Physique/Physique/Optique

Mots Clés : Advection – Convective – Absolute – Photorefractive – Feedback – Noise

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Contributeur : Sébastien Van Luchene <>

Soumis le : Vendredi 8 Janvier 2010, 15:46:11

Dernière modification le : Vendredi 8 Janvier 2010, 15:51:46