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 language | English |
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Pages (from-to) | 350-356 |
Number of pages | 7 |
Journal | Physics Letters A |
Volume | 267 |
Issue number | 5-6 |
Publication status | Published - 27 Mar 2000 |
Keywords
- WEAK OPTICAL FEEDBACK
- COHERENCE COLLAPSE
- CHAOTIC ITINERANCY
- INSTABILITY
- BIFURCATION
- ATTRACTORS
- LINEWIDTH
- SUBJECT
- LANG
- MODE