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Simultaneous generation of multiple time-delay-signature eliminated chaos in ring network of coupled semiconductor lasers with heterogeneous delays
XIANG Shuiying * #,WEN Aijun,LIN Lin,ZHANG Huixing,ZHANG Hao,GUO Xingxing,LI Jiafu
State Key Laboratory of Integrated Service Networks, Xidian University
*Correspondence author
#Submitted by
Subject:
Funding: the Specialized Research Fund for the Doctoral Program of Higher Education of China (No.No. 20130203120001), by the China 111 project (No.No. B08038), the Fundamental Research Funds for the Central Universities (No.No. JB140101), the National Natural Science Foundation of China (No.No. 61306061)
Opened online:24 March 2016
Accepted by: none
Citation: XIANG Shuiying,WEN Aijun,LIN Lin.Simultaneous generation of multiple time-delay-signature eliminated chaos in ring network of coupled semiconductor lasers with heterogeneous delays[OL]. [24 March 2016] http://en.paper.edu.cn/en_releasepaper/content/4681167
 
 
The time delay signature (TDS) properties in ring network of three mutually coupled semiconductor lasers (MCSLs) are investigated quantitatively. The evolution pattern of TDS, which is quantified via the auto-correlation function, for ring network with identical coupling delays as well as with heterogeneous coupling delays are discussed and compared. The effects of coupling strength, frequency detuning and injection current are mainly examined. The parameter regions contributing to successful TDS concealment are identified. It is found that, three sets of chaotic signals with TDS concealment can be simultaneously generated in ring network of three MCSLs under certain condition, and the TDS is mainly affected by injection current and coupling strength, but is not so sensitive to the frequency detuning. To obtain low TDS, larger injection current and smaller coupling strength are desired. Besides, by intentionally introducing heterogeneous coupling delays in the ring network, the TDS can be better concealed in much wider parameter regions compared to the network with identical coupling delays, which is highly desirable for the chaos-based random bit generators.
Keywords:Chaos; semiconductor laser; time delay signature; ring network
 
 
 

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