Delay induced excitability in VCSELs

Tomasz Piwonski, John Houlihan, Thomas Busch, Guillaume Huyet

Research output: Contribution to journalConference articlepeer-review


We analyse the stochastic polarization fluctuations in a vertical cavity surface emitting laser (VCSEL) under the influence of electro-optical feedback and show that the dynamics can be modeled as a bistable system with time-delayed memory. Assuming an asymmetric potential, we show the existence of a regime in which the systems dynamic displays excitability. We calculate the relevant residence time distributions and correlation times and compare our system to a well known discrete model for excitability. Finally, we present experimental data that demonstrates excitable behaviour in the polarization dynamics of a VCSEL and, in particular, show the appearance of coherence resonance.

Original languageEnglish
Article number19
Pages (from-to)152-159
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2005
Externally publishedYes
EventOpto-Ireland 2005: Optoelectronics, Photonic Devices, and Optical Networks - Dublin, Ireland
Duration: 04 Apr 200506 Apr 2005


  • Excitability
  • Feedback
  • Stochastic Dynamics
  • VCSELs


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