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Reference : UMR6303-ANTPIC-001
Workplace : DIJON
Date of publication : Tuesday, February 04, 2020
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 May 2020
Proportion of work : Full time
Remuneration : gross salary between 2600 and 3000 euros (depending on professional experience)
Desired level of education : PhD
Experience required : 1 to 4 years
Context: The project is aimed at studying optical wave turbulence in the presence of a structural disorder of the nonlinear propagating medium. In the weakly nonlinear regime and in the absence of disorder, systematics methods have been developed in the framework of the wave turbulence theory, which has been successfully applied to different physical domains. Nonlinear optics allows one to study wave turbulence through relatively simple experimental configurations where various phenomenological behaviors have been identified on the basis of different wave turbulence formalisms (wave condensation in analogy with Bose-Einstein condensation, or the formation of large scale incoherent structures in analogy with gravitation) .
Objectives: In this theoretical, numerical and experimental project, we envisage to extend different aspects of wave turbulence by taking into account the presence of a structural disorder of the propagating medium. Indeed, light propagation in conventional optical fibres is known to be affected by the disorder due to structural imperfections or external perturbations . The theoretical developments will be analyzed through numerical simulations, which will be used to conceive optical fibre experiments that will be realized at ICB. The impact of disorder on light condensation will be studied in relation with the spatial beam cleaning effect , whose underlying mechanism is still debated .
 A. Picozzi, J. Garnier, T. Hansson, P. Suret, S. Randoux, G. Millot, D. Christodoulides, Optical wave turbulence: Toward a unified nonequilibrium thermodynamic formulation of statistical nonlinear optics, Physics Reports 542, 1-132 (2014)
 I.P. Kaminow, T. Li, and A.F. Willner, Optical Fiber Telecommunications, Systems and Networks (Sixth Ed., Elsevier, 2013)
 K. Krupa, A. Tonello, B.M. Shalaby, M. Fabert, A. Barthélémy, G. Millot, S. Wabnitz, V. Couderc, Spatial beam self-cleaning in multimode fibres, Nature Photon. 11, 237 (2017)
 A. Fusaro, J. Garnier, K. Krupa, G. Millot, A. Picozzi, Dramatic acceleration of wave condensation mediated by disorder in multimode fibers, Phys. Rev. Lett. 122, 123902 (2019)
- development of numerical simulations for the propagation of random waves in nonlinear optical media (multimode optical fibres) characterized by a structural disorder and/or a nonlocal/noninstantaneous nonlinear response.
- realization and analysis of nonlinear optics experiments in multimode optical fibres.
- participation to international conferences
- required skills in numerical simulations of partial differential equations describing the propagation of optical waves in nonlinear media (MatLab, Python...)
- The applicant should be familiar with nonlinear fibre optics experiments and usual techniques of characterization of optical beams in the spatial, temporal and frequency domains.
- Basic knowledge on wave turbulence, stochastic processes, statistical mechanics.
- Writing of scientific publications.
The host laboratory is the Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB) located in Dijon and jointly operated by CNRS and the University of Burgundy. The candidate will work in the SLCO team (Solitons Lasers et Communications Optiques) of the Photonics Department (ICB).
The research will be supervised by A. Picozzi (email@example.com) and G. Millot (firstname.lastname@example.org), in collaboration with J. Garnier (Ecole Polytechnique).
Constraints and risks
The candidate will be required to follow the laboratory safety and health guidelines.
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