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Role of linewidth enhancement factor on time-delay signature concealment of chaos in mutually-coupled semiconductor ring lasers
LI Jiafu,XIANG Shuiying * #,ZHANG Hao,GUO Xingxing
State Key Laboratory of Integrated Service Networks, Xidian University
*Correspondence author
#Submitted by
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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 National Natural Science Foundation of China (No.No. 61306061), the Fundamental Research Funds for the Central Universities (No.No. JB140101)
Opened online:25 April 2016
Accepted by: none
Citation: LI Jiafu,XIANG Shuiying,ZHANG Hao.Role of linewidth enhancement factor on time-delay signature concealment of chaos in mutually-coupled semiconductor ring lasers[OL]. [25 April 2016] http://en.paper.edu.cn/en_releasepaper/content/4684599
 
 
The time-delay signature (TDS) properties in chaotic semiconductor ring lasers (SRLs) with mutual injection are investigated numerically. The TDS is quantified via auto-correlation function. We numerically investigate the influence of linewidth enhancement factor α on the TDS. The results show that the TDS can be efficiently concealed when the linewidth enhancement factor of SRLs is large enough, and much larger ranges of operation parameters can be continuously adjusted. Hence, for practical applications, by simply choosing mutually-coupled SRLs with larger linewidth factors, four sets of widely tunable chaos with TDS concealment can be simultaneously achieved, which is highly desirable for high speed random number generation and optical chaotic encryption system based on chaotic SRLs.
Keywords:Chaos; semiconductor ring lasers; Time-delay signatures;mutual injection; linewidth enhancement factor
 
 
 

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