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Conference Papers Year : 2008

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

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.
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Dates and versions

hal-00278052 , version 1 (07-05-2008)

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Damien Rontani, Alexandre Locquet, Marc Sciamanna, David S. Citrin. Masking the time-delay of the chaotic output of an external-cavity laser. SPIE Photonics Europe 2008, Apr 2008, Strasbourg, France. pp.1-8, ⟨10.1117/12.781307⟩. ⟨hal-00278052⟩
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