Laboratoire Interdisciplinaire Carnot de Bourgogne

General description

The project will be conducted in the SLCO group, Solitons, Lasers and Optical Communications of the Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB) at the University Bourgogne Franche-Comté (Dijon, France). The ICB institute is an UMR, “Unité Mixte de Recherche” between CNRS (Centre National Recherche Scientifique) and University of Burgundy. A strong support for the project will be obtained from these two institutions. The SLCO group consists of 14 researchers (12 experimenters and 2 theoreticians), with an additional average of 10 PhD students and post-docs. The group is led by Professor Guy Millot. It is part of the “Laboratoire d’Excellence” which gathers ICB (Dijon), FEMTO-ST (Besançon) and LNIO (Troyes), and has been selected in a national call for top-level scientific projects (5 M€/year over 8 years). The group has well-established expertize in the study of nonlinear optical effects, in particular in optical fibers (modulational instability, rogue waves, signal processing, optical turbulence, polarization attraction, lasers). In the framework of MULTIPLY project, we propose to study: 1) Optical turbulence: The statistical description of nonequilibrium behavior of random dispersive waves is well developed in the weak nonlinear limit, for which wave turbulence theory provides an appropriate theoretical formulation [e.g., review article, Picozzi et al., Optical wave turbulence, Phys. Reports — 2014)]. However, such an approach breaks down for strong nonlinearities, when the turbulent flow can be heavily affected by nonlinear excitations, e.g., vortices, solitons, shock waves, collapsing wave-packets, or rogue waves. In this regime, no general theory exists. Therefore novel scenarios that can be predicted starting from universal models and observed in real photonic systems are of paramount importance. We will consider this research theme in the framework of systems operating far from thermal equilibrium, e.g. laser cavities. We will explore a different type of turbulence, termed ‘long-range wave turbulence’, in the presence of long-range nonlinearities, which exhibit fascinating collective large-scale behavior, in analogy with gravitational systems (e.g., the formation and interaction of galaxies in the Universe). Experiments will be conducted in the SLCO group in the framework of the platform Picasso. 2) Polarization domain walls: Nonlinear coupling of arbitrary polarized waves in optical fiber can give rise to fascinating phenomena such polarization attraction [1-2] or polarization domain walls. In the framework of the MULTIPLY project, we will study the possibility to observe the formation of polarization domain-wall cavity solitons in a fiber ring cavity driven by a coherent pump beam. These vectorial structures are characterized by a fast switching of ellipticity in the electric field and consist in a kink-type soliton remaining on a CW background. These topological dissipative entities provide a perfect balance between losses, chromatic dispersion and Kerr nonlinearity through a cross-phase modulation process. We will first study the spontaneous generation of isotropic vectorial modulational instability within a fiber ring passive resonator driven by a continuous holding beam. Then, we will demonstrate that these entities can be addressed individually and could be exploited as topological bit-entities for optical data storage applications. The present work will be carried out in the context of a fiber ring cavity but same behavior could be observed in monolithic microresonators.

Website – http://icb.u-bourgogne.fr/

Research Area 1 – Optical turbulence

Contact person – Antonio PICOZZI, Antonio.Picozzi@u-bourgogne.fr

Research Area 2 – Polarization domain walls

Contact person – Julien FATOME, julien.fatome@u-bourgogne.fr

Publications of interest

  • A. Picozzi, J. Garnier, T. Hansson, P. Suret, S. Randoux, G. Millot, D. Christodoulides, “Optical wave turbulence”, Physics Reports 542, 1-132 (2014)
  • G. Xu, D. Vocke, D. Faccio, J. Garnier, T. Roger, S. Trillo, A. Picozzi, “From coherent shocklets to giant collective incoherent shock waves in nonlocal turbulent flows”, Nature Comm. 6, 8131 (2015)
  • J. Garnier, G. Xu, S. Trillo, A. Picozzi, “Incoherent dispersive shocks in the spectral evolution of random nonlinear waves”, Phys. Rev. Lett. 111, 113902 (2013)
  • J. Fatome, S. Pitois, P. Morin, D. Sugny, E. Assémat, A. Picozzi, H. R. Jauslin, G. Millot, V. V. Kozlov and S. Wabnitz, “A universal optical all-fiber omnipolarizer,” Sci. Rep., 2, 938 (2012)
  • P. Y. Bony, M. Guasoni, P. Morin, D. Sugny, A. Picozzi, H. Jauslin, S. Pitois and J. Fatome, “Temporal spying and concealing process in fibre-optic data transmission systems through polarization bypass,” Nature Comm., 5, pp. 5:4678 (2014)