WIAS Preprint No. 631, (2001)

Excitability of lasers with integrated dispersive reflector



Authors

  • Tronciu, Vasile Z.
  • Wünsche, Hans-Jürgen
  • Schneider, Klaus R.
  • Radziunas, Mindaugas

2010 Mathematics Subject Classification

  • 78A60 34C60

Keywords

  • semiconductor laser, excitability, dispersive reflector, optical feedback

Abstract

This paper is concerned with the phenomenon of excitability in semiconductor lasers consisting of a DFB section and a passive dispersive reflector (PDR). We assume that the PDR section contains a Bragg grating and (or) a passive Fabry Perot filter guaranteeing a dispersive reflection of the optical field. We investigate a single mode model for PDR lasers and derive conditions under which excitable behavior can be demonstrated. Especially, we show the existence of a threshold, that is, only perturbations above the threshold imply a large excursion from the steady state, and where the response is almost independent of the strength of the perturbation, moreover we establish the existence of a refractory period, i.e., if a second perturbation is applied before the refractory time has passed, then the system does not respond. Finally, we discuss the importance of excitability for the transmission of signals in communication networks.

Appeared in

  • SPIE Proceedings Series, vol 4283, pp. 347-354, (2001)

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