Enhanced complexity of optical chaos in a laser diode with phase-conjugate feedback

We demonstrate numerically that a semiconductor laser subjected to phase-conjugate feedback (PCF) can exhibit an enhancement in the complexity of chaos by comparison to conventional optical feedback. Using quantifiers from spectral analysis and information theory, we demonstrate that under similar p...

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Bibliographic Details
Published in:Optics letters 2016-10, Vol.41 (20), p.4637-4640
Main Authors: Rontani, D, Mercier, E, Wolfersberger, D, Sciamanna, M
Format: Article
Language:English
Subjects:
Bandwidth
Chaos theory
Complexity
Engineering Sciences
Feedback
Nonlinear Sciences
Optical feedback
Physics
Random numbers
Semiconductor lasers
Spectra
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Summary:We demonstrate numerically that a semiconductor laser subjected to phase-conjugate feedback (PCF) can exhibit an enhancement in the complexity of chaos by comparison to conventional optical feedback. Using quantifiers from spectral analysis and information theory, we demonstrate that under similar parametric conditions, PCF exhibits a larger chaotic bandwidth and higher spectral flatness and statistical complexity. These properties are of utmost importance for applications in secure communications and random number generation.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.41.004637