Dynamical origin of low frequency fluctuations in external cavity semiconductor lasers

Ruslan L. Davidchack, Ying-Cheng Lai, Athanasios Gavrielides, Vassilios Kovanis

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)350-356
Number of pages7
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number5-6
StatePublished - Mar 27 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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