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Semiconductor Lasers with Integrated Optical Delay: A Nonlinear Dynamics Lab

  • Talk

  • Hans-Juergen Wuensche
  • Department of Physics, Humboldt-University of Berlin, Germany
  • 9 de marzo de 2006 a las 14:30
  • Sala de Juntes, Ed. Mateu Orfila
  • Announcement file

In recent years, the role of delay in nonlinear systems, arising from a finite propagation time of signals, has become a focus of interest. This talk concerns feedback and coupling delay introduced by a passive section within multisection lasers. Although being only few ps long,
this delay gives rise to a rich world of dynamical phenomena, which can be controlled by dc injection currents. Exploiting these possibilities, we have experimentally prepared and studied the following scenarios: undamping of relaxation oscillations, two-mode pulsations due to amplified feedback, synchronization of delay-coupled oscillators, torus-breakup and period doubling routes to chaos, excitability at homoclinic bifurcations as well as of chaotic attractor ruins, coherence resonance of noisy precursors of Hopf and torus-birth bifurcations. Examples will be presented together with a theoretical discussion of the experimental findings.




Detalles de contacto:

Damià Gomila

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