Complexity and bandwidth enhancement in unidirectionally coupled semiconductor lasers with time-delayed optical feedback

Kazutaka Kanno, Atsushi Uchida, and Masatoshi Bunsen

Phys. Rev. E 93, 032206 – Published 7 March 2016

Abstract

We numerically investigate the frequency bandwidth and the autocorrelation characteristics of chaotic temporal wave forms in unidirectionally coupled semiconductor lasers with time-delayed optical feedback. We evaluate the complexity of the chaotic temporal wave forms by using Lyapunov exponents. We found that larger maximum Lyapunov exponents can be obtained for smaller peak values of the autocorrelation function at the delay time of the optical feedback. On the contrary, the maximum Lyapunov exponent is independent from the frequency bandwidth of the chaotic temporal wave forms.

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Received 10 February 2015
Revised 11 December 2015

DOI:https://doi.org/10.1103/PhysRevE.93.032206

Physics Subject Headings (PhySH)

Control & applications of chaos Semiconductor lasers

Nonlinear time-delay systems

Nonlinear Dynamics

Authors & Affiliations

Kazutaka Kanno^1,*, Atsushi Uchida^2,†, and Masatoshi Bunsen^1,‡

¹Department of Electronics Engineering and Computer Science, Fukuoka University, 8-19-1 Nanakuma, Johnan-ku, Fukuoka 814-0180, Japan
²Department of Information and Computer Sciences, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama City, Saitama, 338-8570, Japan

^*kkanno@fukuoka-u.ac.jp
^†auchida@mail.saitama-u.ac.jp
^‡bunsen@fukuoka-u.ac.jp

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Issue

Vol. 93, Iss. 3 — March 2016

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