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Open Access item Entrainment of optical low-frequency fluctuations is enhanced by coupling

Authors:Buldú, Javier M.
García-Ojalvo, Jordi
Torrent, M. C.
Vicente, Raúl
Pérez, Toni
Mirasso, Claudio R.
Keywords:Low-frequency fluctuations, Periodic entrainment, Current modulation, Coupled semiconductor lasers, Synchronization, Bidirectional coupling
Issue Date:5-Mar-2003
Publisher:World Scientific Publishing
Citation:Fluctuation and Noise Letters 3(2): 127-136 (2003)
Abstract:The control of the low-frequency fluctuations exhibited by two mutually coupled semiconductor lasers is studied experimentally and numerically. We observe that coupling enhances the response of the system to a weak periodic modulation of the injection current of one of the lasers, leading to a highly efficient entrainment of the synchronized low-frequency power dropouts to the external periodic driving. We compare the quality of the entrainment with the one obtained in a single semiconductor laser with optical feedback, showing the beneficial role of coupling in this pursuit. The experimental observations are satisfactorily reproduced by numerical simulations of a set of coupled delay-differential rate equations.
Description:10 pages, 7 figures.-- Full-text version available Open Access at: http://www-fen.upc.es/users/ojalvo/papers/elff.pdf
Publisher version (URL):http://dx.doi.org/10.1142/S0219477503001191
URI:http://hdl.handle.net/10261/14845
ISSN:0219-4775 (Print)
1793-6780 (Online)
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