Laurent Larger
Full Professor (PR1) University of Franche-Comté (UFC)
Junior member (2007) Institut universitaire de France (IUF)
France

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Nonlinear Delay Dynamics &
Advanced Photonic Applications

Chaos for optical secure communications / Limit cycle for high spectral purity optoelectronic microwave oscillator / Transient from stable steady states for Photonic LSM

My early interest in nonlinear dynamics mainly started with my PhD ("Wavelength chaos for optical encryption", 94-97, advisor Prof. Jean-Pierre Goedgebuer). Since then, I never stopped enjoying doing research in that area. More precisely, my research is developed in the particular framework of advanced photonic applications involving various dynamical behavior performed by nonlinear delay optoelectronic feedback loop systems, from high complexity chaotic motions (chaotic optical encryption), to transient dynamics excited from a stable steady state (photonic computing via Liquid State Machines principles), through high regularity limit cyles (e.g. for pure tone radar microwave sources).

This work is being developed within the Optoelectronics, Photonics and Optical Telecommunications (OPTO) Group in the Optics department P.M. Duffieux of the FEMTO-ST Institute, a research institute affiliated to the French National Center for Scientific Research (CNRS).

The main scientific achievements I have contributed to, are the following: first demonstration of optical chaos communications (patented in 1996, Phys.Rev.Lett. 1998) using a chaos in wavelength approach; design, demonstration, and theoretical description of a chaotic oscillator involving coherence modulation (JOSA B 2001); (one of the?) first introduction of bandpass (integro-differential) delay dynamics (IEEE Trans.Circ.Syst.. 2002, Phys.Rev.Lett. 2005, Phys.Rev.E 2009, Nature News & Views 2010); fastest (3Gb/s) and highest link quality (10^-9 bit error rate) in a laboratory optical chaos communication link (Electron.Lett. 2004) with an intensity electro-optic (EO) chaos generator; with that same setup, main contribution to the first field experiment on optical chaos communication over more than 100km of the metropolitan area network of Athens (Nature 2005); first experimental demonstration of distant isochronous chaos synchronization in mutually coupled delay EO oscillators (Phys.Rev.E 2007) experimental and theoretical description of the envelope modulation instability occuring in microwave oscillations from a delay line narrowband optoelectronic oscillators (Optics Lett. 2007); demonstration of a microwave photonic oscillator involving an MgF₂ 5-millimeter diameter optical disk resonator (IEEE Photon.Technol.Lett. 2010); fastest (10Gb/s) and highest link quality optical chaos communication (IEEE J.Quant.Electron. 2010) using EO phase chaos arcitecture and first field experiment at that speed on the "Lumière brothers" fiber ring network in our city of Besançon; hybrid analog and digital key optical chaos communication (Phys.Rev.Lett. 2011) first experimental demonstration of a photonic liquid state machine performing a kind of neuromorphic computer (submitted, 2011)

Last updated on July 2011.
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