Loss of time-delay signature in the chaotic output of a semiconductor laser with optical feedback
Author(s) -
Damien Rontani,
Alexandre Locquet,
Marc Sciamanna,
D. S. Citrin
Publication year - 2007
Publication title -
optics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.32.002960
Subject(s) - semiconductor laser theory , laser , optics , chaotic , oscillation (cell signaling) , semiconductor , optical chaos , physics , synchronization (alternating current) , computer science , optoelectronics , telecommunications , artificial intelligence , biology , genetics , channel (broadcasting)
We investigate theoretically the possibility of retrieving the value of the time delay of a semiconductor laser with an external optical feedback from the analysis of its intensity time series. When the feedback rate is moderate and the injection current set such that the laser relaxation-oscillation period is close to the delay, then the time-delay identification becomes extremely difficult, thus improving the security of chaos-based communications using external-cavity lasers.
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