Semiconductor lasers driven by self-sustained chaotic electronic oscillators and applications to optical chaos cryptography

Sifeu Takougang Kingni, Jimmy Mbe, Paul Woafo

Research output: Contribution to journalArticle

17 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)33108
Number of pages1
JournalChaos
Volume22
Publication statusPublished - 1 Sep 2012

Keywords

  • nonlinear dynamics
  • chaos
  • Chua oscillator
  • semiconductor lasers

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