title: Semiconductor lasers driven by self-sustained chaotic electronic oscillators and applications to optical chaos cryptography.
abstract: In this work, we numerically study the dynamics of vertical cavity surface emitting laser (VCSEL) firstly when it is driven by Chua's oscillator, secondly in case where it is driven by a broad frequency spectral bandwidth chaotic oscillator developed by Nana et al. [Commun. Nonlinear Sci. Numer. Simul. 14, 2266 (2009)]. We demonstrated that the VCSEL generated robust chaotic dynamics compared to the ones found in VCSEL subject to a sinusoidally modulated current and therefore it is more suitable for chaos encryption techniques. The synchronization characteristics and the communication performances of unidirectional coupled VCSEL driven by the broad frequency spectral bandwidth chaotic oscillators are investigated numerically. The results show that high-quality synchronization and transmission of messages can be realized for suitable system parameters. Chaos shift keying method is successfully applied to encrypt a message at a high bitrate.
authors.affiliation: Laboratory of Modelling and Simulation in Engineering and Biomimetics and Prototypes, Department of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon.
authors.forename: Sifeu Takougang
authors.initials: ST
authors.lastname: Kingni
authors.forename: Jimmi Hervé Talla
authors.initials: JH
authors.lastname: Mbé
authors.forename: Paul
authors.initials: P
authors.lastname: Woafo
mesh_terms: D003142:Communication; D004581:Electronics; D054023:Lasers, Semiconductor; D017711:Nonlinear Dynamics; D055095:Optics and Photonics / Q000379:methods*; D009991:Oscillometry / Q000379:methods*; D013997:Time Factors