Dynamical origin of low frequency fluctuations in external cavity semiconductor lasers

R L Davidchack, Y C Lai, A Gavrielides, V Kovanis, Ying-Cheng Lai

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Abstract

Low-frequency fluctuations (LLFs) in semiconductor lasers subject to time-delayed optical feedback from external reflectors have been experimentally observed and theoretically studied for the past two decades. Yet recently a question has come into focus: whether these fluctuations are only a transient phenomenon. This Letter addresses this issue from the viewpoint of deterministic chaotic transitions. In particular, we investigate the single-mode single-delay Lang-Kobayashi equations by constructing a scheme that allows for a detailed bifurcation analysis and, consequently, an understanding of the coexistence of LFFs and stable emission on the maximum gain mode, the latter's being the subject of recent experiments [Phys. Rev. A 60 (1999) 634]. Our computations suggest that LFFs can be either transient or sustained, depending on the dynamical interplay between the maximum gain mode and a chaotic set. (C) 2000 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)350-356
Number of pages7
JournalPhysics Letters A
Volume267
Issue number5-6
Publication statusPublished - 27 Mar 2000

Keywords

  • WEAK OPTICAL FEEDBACK
  • COHERENCE COLLAPSE
  • CHAOTIC ITINERANCY
  • INSTABILITY
  • BIFURCATION
  • ATTRACTORS
  • LINEWIDTH
  • SUBJECT
  • LANG
  • MODE

Cite this

Davidchack, R. L., Lai, Y. C., Gavrielides, A., Kovanis, V., & Lai, Y-C. (2000). Dynamical origin of low frequency fluctuations in external cavity semiconductor lasers. Physics Letters A, 267(5-6), 350-356.