Summary

International Symposium on Nonlinear Theory and Its Applications

2015

Session Number:A4L-C

Session:

Number:A4L-C-5

Entropy Enhancement in a Semiconductor Laser with Double Optical Feedback

Miwa Tezuka,  Kazutaka Kanno,  Atsushi Uchida,  Masatoshi Bunsen,  

pp.273-276

Publication Date:2015/12/1

Online ISSN:2188-5079

DOI:10.34385/proc.47.A4L-C-5

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Summary:
We compute the Lyapunov spectrum and Kolmogorov-Sinai entropy for a semiconductor laser subject to double optical feedback. The spectrum and entropy are utilized for evaluating complexity of chaos and are important for some applications such as physical random number generation and secure communication based on optical chaos. In particular, we focus on the dependence of their measures on the relationship between the two delay times for double feedback. The entropy is enhanced when one of the delay times is longer than amounts of the time when characteristics of the shorter delay time in the auto-correlation of the time-series become vanished.