UFR de Physique

Propositions de stages en laboratoire -- M2

Les offres sont actualisées en mai. Par exemple, les offres de stages pour l'année universitaire 2015-2016 seront mises en place en mai 2015, les offres de stages pour l'année universitaire 2016-2017 seront mises en place pour en mai 2016, etc.

Study of light control and management for routing functions in telecommunications

  • Option Lumière-Matière, Générique du parcours Lumière-Matière
  • Laboratoire: Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM)
  • Responsable du stage: LOUVERGNEAUX Eric (eric.louvergneaux@univ-lille1.fr, 03.20.33.64.43)
  • Mots clés: Telecommunications, optics, liquid crystals, nonlinear effects
  • Fiche complète en PDF : Fiche complète en PDF

At the time of Internet and telecommunications, high-speed networks have become a crucial issue that requires always increasing the transfer rates. To meet this challenge, the solution is to use all-optical communications that is to replace e.g. electronic operations by much faster optical operations. Thus, the study and development of logic gates, routers, optical switches, etc. have become highly sought-after study elements. We propose here to study the routing of light, that is to say the control and the management of the trajectory of the light in such a way as to be able, for example, to direct it as desired towards a target. The way used to reach such a goal is to exploit the non-linear interactions experienced by light when it propagates trough a medium. Examples of non-linear effects are self-focusing with the creation of "optical bits", shock waves, generation of new frequencies, etc. The idea here is to take advantage of these effects to control and manipulate the trajectory of light in order to realize the "routing" of light. The experimental system used is a slice of liquid crystals in which we study the effects of non-linear propagation of light beams. Several profiles of beams will be studied to explore the different possibilities of encountered effects. The aim is to analyze the nonlinear effects, their stability, their robustness, the reachable deflections, and so on. The training will mainly include aspects of assemblages and realizations of optical experiments, but also lead to theoretical works and numerical simulations to understand and explain the experimentally observed phenomena