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ECOLE SUPÉRIEURE D'ÉLECTRICITÉ Une grande école d'ingénieurs au cœur des sciences de l'information,de l'énergie et des systèmes |
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Conference papers
Advection effect in a photorefractive single feedback system: from noise- to dynamics- sustained instabilities
Abstract : An experimental analysis of the dynamics of optical patterns emerging from a photorefractive two-wave mixing geometry is investigated. The dynamics appears in the system, when a tilted single feedback mirror gives rise to an advection-like effect. Depending on the nonlocal coupling (introduced by the tilting angle) between the two counterpropagating beams, the strength of the nonlocal response of the nonlinear photorefractive bulk medium and the distance mirror-crystal, we report on: the seeding of new pattern geometry, the inversion of pattern transverse phase velocity and the bifurcation from convective to absolute instabilities.
https://hal-supelec.archives-ouvertes.fr/hal-00552146
Contributor : Sébastien van Luchene Connect in order to contact the contributor
Submitted on : Wednesday, January 5, 2011 - 3:45:18 PM
Last modification on : Sunday, October 17, 2021 - 3:02:10 AM
Contributor : Sébastien van Luchene Connect in order to contact the contributor
Submitted on : Wednesday, January 5, 2011 - 3:45:18 PM
Last modification on : Sunday, October 17, 2021 - 3:02:10 AM