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Characterization of the chaos generated by semiconductor lasers subject to electro-optical and all-optical feedback

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4 Author(s)
Vicente, Raul ; Inst. Mediterraneo de Estudios Avanzados, Campus Univ. de les Illes Balears, Palma de Mallorca, Spain ; Dauden, J.L. ; Colet, P. ; Toral, R.

We characterize the chaotic dynamics of semiconductor lasers subject to either optical or electro-optical feedback. This characterization is relevant for secure optical communications based on chaos encryption. In particular, we compute as function of system parameters the following quantifiers: Lyapunov spectrum (which measures the rate at which the distance between infinitesimally close solutions increases in time), the Kaplan-Yorke dimension (conjectured to be equal to the information dimension which measures the amount of information needed to locate the system in phase space with infinitesimal accuracy) and the Kolmogorov-Sinai entropy (which measures the average loss of information rate, or equivalently is inversely proportional to the time interval over which the future evolution can be predicted).

Published in:

Quantum Electronics Conference, 2003. EQEC '03. European

Date of Conference:

22-27 June 2003