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Título

Synchronization properties of coupled semiconductor lasers subject to filtered optical feedback

AutorSoriano, Miguel C. ; Ruiz-Oliveras, Flavio; Colet, Pere ; Mirasso, Claudio R.
Palabras claveChaotic communication
Laser beams
Laser feedback
Laser stability
Optical chaos
Optical filters
Optical receivers
Semiconductor lasers
Synchronisation
[PACS] Communication using chaos
[PACS] Control of chaos, applications of chaos
[PACS] Dynamics of nonlinear optical systems
Fecha de publicación30-oct-2008
EditorAmerican Physical Society
CitaciónPhysical Review E 78(4): 046218 (2008)
ResumenWe study numerically the synchronization properties of two unidirectionally coupled semiconductor lasers subject to filtered optical feedback. By adding a perturbation (a message) to the output of the master laser, we show that mutual information allows distinguishing between chaotic synchronization (at low to moderate coupling strengths) and injection locking (at large coupling strength). We find that a receiver subject to a feedback similar to that of the emitter (closed-loop receiver) shows better synchronization with the master laser when compared with a receiver without feedback (open-loop receiver). Closed-loop receivers also show better capability to recover weak messages. The filter in the feedback loop allows reducing the bandwidth of the chaotic carrier, improves the synchronization with respect to the conventional feedback case, and requires less coupling strength with a minor loss in complexity.
Descripción8 pages, 16 figures.-- PACS nrs.: 05.45.Vx; 05.45.Gg; 42.65.Sf.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevE.78.046218
URIhttp://hdl.handle.net/10261/14831
DOI10.1103/PhysRevE.78.046218
ISSN1539-3755
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