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Published on: February 28, 2016
Correlations in electrically coupled chaotic lasers
E J Rosero1, W A S Barbosa1, J F Martinez Avila1,2
1Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Cidade Universitária, Recife, PE, Brazil.
Abstract:
We show how two electrically coupled semiconductor lasers having optical feedback can present simultaneous antiphase correlated fast power fluctuations, and strong in-phase synchronized spikes of chaotic power drops. This quite counterintuitive phenomenon is demonstrated experimentally and confirmed by numerical solutions of a deterministic dynamical system of rate equations. The occurrence of negative and positive cross correlation between parts of a complex system according to time scales, as proved in our simple arrangement, is relevant for the understanding and characterization of collective properties in complex networks.
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