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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Conference papers
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https://hal-supelec.archives-ouvertes.fr/hal-00278052
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Submitted on : Wednesday, May 7, 2008 - 6:34:59 PM
Last modification on : Thursday, November 21, 2019 - 7:30:03 AM

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Damien Rontani, Alexandre Locquet, Marc Sciamanna, David 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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