Feedback induced instabilities in a quantum dot semiconductor laser

Olwen Carroll, Ian O'Driscoll, Stephen P. Hegarty, Guillaume Huyet, John Houlihan, Evgeny A. Viktorov, Paul Mandel

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


We analyse the properties of GaAs based quantum dot semiconductor lasers emitting near 1310 nm. The line-width enhancement factor is shown to depend strongly on device temperature, ranging from 1.5 at 20 degrees C to 5 at 50 degrees C. With optical feedback from a distant reflector, devices remained stable at 20 degrees C but displayed a range of instabilities at 50 degrees C, including irregular power drop - outs and periodic pulsations, before entering a chaotic regime. Such dynamical features are unique to quantum dot lasers - quantum well lasers are significantly more unstable under optical feedback making such a clear route to chaos difficult to observe. (c) 2006 Optical Society of America.
Original languageEnglish
Pages (from-to)10831-10837
Number of pages7
JournalOptics Express
Issue number22
Publication statusPublished - Oct 2006


  • Linewidth enhancement factor
  • cavity
  • diodes
  • gain
  • optical feedback
  • sensitivity


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