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Bubbling in delay-coupled lasers.

V Flunkert1, O D'Huys, J Danckaert

  • 1Institut für Theoretische Physik, TU Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|August 8, 2009
PubMed
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This study explores chaos synchronization in coupled lasers. Active relays can suppress noise-induced desynchronization (bubbling), unlike passive relays.

Area of Science:

  • Nonlinear Dynamics
  • Laser Physics
  • Chaos Theory

Background:

  • Chaos synchronization is crucial for secure communication and complex systems.
  • Understanding laser dynamics with delayed feedback is essential for controlling chaotic behavior.

Purpose of the Study:

  • To theoretically investigate chaos synchronization in delay-coupled lasers using active and passive relays.
  • To analyze the conditions leading to desynchronization phenomena like bubbling and intermittency.
  • To explore methods for suppressing desynchronization using active relay configurations.

Main Methods:

  • Theoretical modeling of two delay-coupled lasers.
  • Analysis of system dynamics under active and passive relay coupling.
  • Investigation of transverse antimode instability for desynchronization.

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  • Numerical simulations to demonstrate bubbling suppression.

    • Main Results:

    • Synchronized laser dynamics were found to be equivalent to a single laser with delayed feedback (passive relay) or two coupled lasers (active relay).
    • The system exhibited noise-induced desynchronization (bubbling) and on-off intermittency, linked to transverse antimode instability.
    • Active relays were shown to effectively suppress bubbling, unlike passive relays.

    Conclusions:

    • Active relays offer a viable method to control and suppress desynchronization in chaotic laser systems.
    • Transverse antimode instability plays a key role in the desynchronization dynamics of coupled lasers.
    • Theoretical insights provide a foundation for designing more robust synchronized laser systems.