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Proceedings Paper

Masking the time-delay of the chaotic output of an external-cavity laser
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Paper Abstract

We investigate theoretically the identification of the external-cavity roundtrip time of an external-cavity semiconductor laser (ECSL). The time-delay identification is performed by analyzing the laser-intensity time series with conventional techniques based on the autocorrelation function or mutual information. We find that a weak feedback rate and a time-delay close to the laser's intrinsic relaxation-oscillation period are two conditions leading to difficult delay identification. This arduous time-delay identification is of particular interest for the security improvement of chaos-based communications schemes using ECSLs.

Paper Details

Date Published: 19 May 2008
PDF: 8 pages
Proc. SPIE 6997, Semiconductor Lasers and Laser Dynamics III, 69970D (19 May 2008); doi: 10.1117/12.781307
Show Author Affiliations
D. Rontani, Supélec, LMOPS-CNRS (France)
Georgia Tech-CNRS, Georgia Tech Lorraine (France)
Georgia Institute of Technology (United States)
A. Locquet, Georgia Tech-CNRS, Georgia Tech Lorraine (France)
M. Sciamanna, Supélec, LMOPS-CNRS (France)
Georgia Tech-CNRS, Georgia Tech Lorraine (France)
D. S. Citrin, Georgia Tech-CNRS, Georgia Tech Lorraine (France)
Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 6997:
Semiconductor Lasers and Laser Dynamics III
Krassimir P. Panajotov; Marc Sciamanna; Angel A. Valle; Rainer Michalzik, Editor(s)

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