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Article Dans Une Revue IEEE Journal of Quantum Electronics Année : 2009

Time-Delay Identification in a Chaotic Semiconductor Laser With Optical Feedback: A Dynamical Point of View

Résumé

A critical issue in optical chaos-based communications is the possibility to identify the parameters of the chaotic emitter, and hence to break the security. In this paper, we study theoretically the identification of a chaotic emitter that consists of a semiconductor laser with an optical feedback. The identification of a critical security parameter, the external-cavity-round trip time (the time delay in the laser dynamics), is performed using both the auto-correlation function and delayed mutual information methods applied to the chaotic time-series. The influence on the time-delay identification of the experimentally tunable parameters, the feedback rate, the pumping current and the time-delay value, is carefully studied. We show that difficult time-delay-identification scenarios strongly depend on the timescales of the system dynamics as it undergoes a route to chaos, in particular on how close is the relaxation oscillation period from the external-cavity-roundtrip time.
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hal-03079791 , version 1 (17-12-2020)

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Damien Rontani, A. Locquet, Marc Sciamanna, David S Citrin, Silvia Ortin. Time-Delay Identification in a Chaotic Semiconductor Laser With Optical Feedback: A Dynamical Point of View. IEEE Journal of Quantum Electronics, 2009, 45 (7), pp.879-1891. ⟨10.1109/JQE.2009.2013116⟩. ⟨hal-03079791⟩
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