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

D. Rontani; A. Locquet; M. Sciamanna; D. S. Citrin

doi:10.1117/12.781307

19 May 2008 Masking the time-delay of the chaotic output of an external-cavity laser

D. Rontani, A. Locquet, M. Sciamanna, D. S. Citrin

Proceedings Volume 6997, Semiconductor Lasers and Laser Dynamics III; 69970D (2008) https://doi.org/10.1117/12.781307
Event: SPIE Photonics Europe, 2008, Strasbourg, France

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.

Citation Download Citation

D. Rontani, A. Locquet, M. Sciamanna, and D. S. Citrin "Masking the time-delay of the chaotic output of an external-cavity laser", Proc. SPIE 6997, Semiconductor Lasers and Laser Dynamics III, 69970D (19 May 2008); https://doi.org/10.1117/12.781307

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