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Título: | Synchronization properties of coupled semiconductor lasers subject to filtered optical feedback |
Autor: | Soriano, Miguel C. ; Ruiz-Oliveras, Flavio; Colet, Pere CSIC ORCID ; Mirasso, Claudio R. CSIC ORCID | Palabras clave: | Chaotic communications 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 publicación: | 30-oct-2008 | Editor: | American Physical Society | Citación: | Physical Review E 78(4): 046218 (2008) | Resumen: | We 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. | Descripción: | 8 pages, 16 figures.-- PACS nrs.: 05.45.Vx; 05.45.Gg; 42.65.Sf. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevE.78.046218 | URI: | http://hdl.handle.net/10261/14831 | DOI: | 10.1103/PhysRevE.78.046218 | ISSN: | 1539-3755 |
Aparece en las colecciones: | (IFISC) Artículos |
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