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Chaotic signals have been proposed as broadband information carriers with the potential of providing a high level of robustness and privacy in data transmission. Laboratory demonstrations of chaos-based optical communications have already shown the potential of this technology, but a field experiment using commercial optical networks has not been undertaken(More)
Large variety of physical, chemical, and biological systems show excitable behavior, characterized by a nonlinear response under external perturbations: only perturbations exceeding a threshold induce a full system response (firing). It has been reported that in coupled excitable identical systems noise may induce the simultaneous firing of a macroscopic(More)
We numerically show that the synchronization of two chaotic semiconductor lasers is possible when a small amount of output intensity from one is injected into the other. We also show that a message can be encoded in the chaotic carrier, transmitted by an optical ber and decoded by a receiver with a very good quality.
We derive general conditions for 100% frequency conversion in any doubly resonant nonlinear cavity, for both second-and third-harmonic generation via χ (2) and χ (3) nonlinearities. We find that conversion efficiency is optimized for a certain " critical " power depending on the cavity parameters, and assuming reasonable parameters we predict 100%(More)
—Synchronization phenomena of two chaotically emitting semiconductor lasers subject to delayed optical feedback are investigated. The lasers are unidirectionally coupled via their optical fields. Our experimental and numerical studies demonstrate that the relative optical feedback phase is of decisive importance: a characteristic synchronization scenario(More)
  • Y Kouomou Chembo, K Volyanskiy, L Larger, E Rubiola, P Colet
  • 2008
We introduce a stochastic model for the determination of phase noise in optoelectronic oscillators. After a short overview of the main results for the phase diffusion approach in autonomous oscillators, an extension is proposed for the case of optoelectronic oscillators where the microwave is a limit-cycle originated from a bifurcation induced by(More)
—We characterize the chaotic dynamics of semiconductor lasers subject to either optical or electrooptical feedback modeled by Lang–Kobayashi and Ikeda equations, respectively. This characterization is relevant for secure optical communications based on chaos encryption. In particular, for each system we compute as a function of tunable parameters the(More)
We numerically study the synchronization of two chaotic semiconductor lasers in a master-slave connguration. To synchronize the lasers a small amount of output power from the master laser is injected, after propagating through an optical ber, into the slave laser. We show that the output of the master laser can be used as a chaotic carrier to encode a(More)
Coupled Ginzburg-Landau equations appear in a variety of contexts involving in-stabilities in oscillatory media. When the relevant unstable mode is of vectorial character (a common situation in nonlinear optics), the pair of coupled equations has special symmetries and can be written as a vector complex Ginzburg-Landau equation. Dynamical properties of(More)