Open AccessEvolution of time delay signature of chaos generated in a mutually delay-coupled semiconductor lasers system
Author(s) -
Jiagui Wu,
Zheng-Mao Wu,
Guang-Qiong Xia,
Guoying Feng
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.001741
Subject(s) - signature (topology) , chaotic , semiconductor laser theory , physics , series (stratigraphy) , optics , statistical physics , entropy (arrow of time) , laser , algorithm , computer science , mathematics , quantum mechanics , artificial intelligence , paleontology , geometry , biology
In this paper, evolution of time delay (TD) signature of chaos generated in a mutual delay-coupled semiconductor lasers (MDC-SLs) system is investigated experimentally and theoretically. Two statistical methods, including self-correlation function (SF) and permutation entropy (PE), are used to estimate the TD signature of chaotic time series. Through extracting the characteristic peak from the SF curve, a series of TD signature evolution maps are firstly obtained in the parameter space of coupled strength and frequency detuning. Meantime, the influences of injection current on the evolution maps of TD signature have been discussed, and the optimum scope of TD signature suppression is also specified. An overall qualitative agreement between our theoretical and experimental results is obtained.