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Coherence Resonance in Optical Feedback Chaos: Hiding Frequency in Chaos Communication

In: Chaos Theory

Author

Listed:
  • Ban Al Bayati
  • Ahmad Ahmad
  • Sudad Ahmed

Abstract

In this chapter, an experimentally and numerically conducted investigation of the existence of high chaotic spiking in the dynamics of semiconductor lasers with AC-coupled optical feedback, the bifurcation diagram by feedback strength attenuation and the bias current as a control parameter was done. A semiconductor laser subjected to an external optical feedback can present a big change of dynamic behaviors, such as periodic and quasi-periodic oscillations, chaos, coherence collapse, and low-frequency fluctuations (LFF's) that degrade the laser characteristics. The chaotic instability is experimentally investigated on feedback strength as a control parameter, and the resulted dynamic is monostability. Finally, we indicated that the observed chaotic dynamic is a good candidate to hide information in order to investigate the resonance phenomena, which is important for chaos to encrypt data in optical communication, where data disappear when modulated in a chaos carrier. The aim of this chapter is to investigate the encryption area in the chaotic system when the applied frequency is 1-500 MHz, for satisfying the secure communication.

Suggested Citation

  • Ban Al Bayati & Ahmad Ahmad & Sudad Ahmed, 2018. "Coherence Resonance in Optical Feedback Chaos: Hiding Frequency in Chaos Communication," Chapters, in: Kais A. M. Al Naimee (ed.), Chaos Theory, IntechOpen.
    • Handle: RePEc:ito:pchaps:123077
    DOI: 10.5772/intechopen.71389
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    More about this item

    Keywords

    chaos communication; chaotic instability; chaos modulation; hidden frequency; resonance phenomena;
    All these keywords.

    JEL classification:

    • C60 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - General

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