Des molécules de solitons en cavité laser : formation, vibration, dissociation

International audienc

Vibration d'une molécule soliton dans un laser à fibre optique en régime de modes bloqués

National audienc

Oscillations de doublets solitons dissipatifs en cavité laser

Nous considérons deux solitons temporels dissipatifs en interaction dans une cavité laser à fibre en anneau. Lorsque deux solitons forment un doublet auto-verrouillé en phase, nous montrons numériquement l'existence d'un nouveau type de doublet soliton, caractérisé par des pulsations stables du système soliton-soliton. Ces pulsations correspondent à une variation lente et périodique de la distance et de la relation de phase entre les deux solitons. La trajectoire stationnaire parcourue dans l'espace des phases peut être interprétée comme un cycle attracteur limite

Dynamics of a Nonlinear electro-optical delay oscillator and its application for multi-Gbit/s chaos-communication

International audienc

Bifurcations and multiple-period soliton pulsations in a passively mode-locked fiber laser

The multiple-period pulsations of the soliton parameters in a passively mode-locked fiber laser were discussed numerically and experimentally. It was found that the pulse acquired a periodic evolution that was not related to the round-trip time and consisted of many round trips. The macroperiodicity existed independently or in combination with other periodicity such as period doubling, tripling etc. Analysis shows that the new periods in the soliton modulation appear at bifurcation point related to certain points related to certain values of the cavity parameters.The work of J.M.S.C. was supported by the MEyC under Contract No. BFM2003-00427.Peer Reviewe

Dissipative soliton interactions inside a fiber laser cavity

We report our recent numerical and experimental observations of dissipative soliton interactions inside a fiber laser cavity. A bound state, formed from two pulses, may have a group velocity which differs from that of a single soliton. As a result, they can collide inside the cavity. This results in a variety of outcomes. Numerical simulations are based either on a continuous model or on a parameter-managed model of the cubic-quintic Ginzburg-Landau equation. Each of the models provides explanations for our experimental observations. © 2005 Elsevier Inc. All rights reserved.The work of J.M.S.C. was supported by the M.E.Y.C. under contract BFM2003-00427.Peer Reviewe

Dynamiques non linéaires expérimentales à retard et à temps discret

International audienceNous observons expérimentalement des dynamiques à temps discret obtenues au sein d'un oscillateur optoélectronique non linéaire à retard alimenté par une source impulsionnelle. Au travers d'une étude complète nous avons recherché de manière systématique des diagrammes de bifurcation en fonction d'un des paramètres du système. L'analyse de ces diagrammes a permis de mettre en évidence une évolution en T2, T4, T3 menant au chaos

Phase chaos for optical communications and cracking issues

International audienc

Synchronisation and communication with regulary clocked optoelectronic discrete time chaos

International audienceA report is presented on the first synchronisation results with two optoelectronic nonlinear delayed feedback subsystems generating sequences of regularly clocked picosecond light pulses with chaotically distributed amplitude. chaos encoding and decoding of pseudorandom binary information is also demonstrated. the proposed principle is a promising way for securing high-rate communications with chaos at the physical level

Dissipative soliton pulsations with periods beyond the laser cavity round trip time

We review recent results on periodic pulsations of the soliton parameters in a passively mode-locked fiber laser. Solitons change their shape, amplitude, width and velocity periodically in time. These pulsations are limit cycles of a dissipative nonlinear system in an infinite-dimensional phase space. Pulsation periods can vary from a few to hundreds of round trips. We present a continuous model of a laser as well as a model with parameter management. The results of the modeling are supported with experimental results obtained using a fiber laser. © World Scientific Publishing Company.Peer Reviewe