Extracting the time delay signature of coupled optical chaotic systems by mutual statistic

Extracting the time delay signature of coupled optical chaotic systems by mutual statistical

analysis

Xinhua ZHU;Mengfan CHENG;Lei DENG;Xingxing JIANG;Deming LIU

【期刊名称】《中国高等学校学术文摘·光电子学》 【年(卷),期】2017(010)004

【摘要】The time delay (TD) signature is a critical parameter in optical chaos-based applications.The feasibility of extracting the TD has been a crucial issue that significantly influences the performance of these applications.In this paper,statistical analyses have been conducted to extract the TD signatures from different types of coupled optical chaos systems.More specifically,a mutually coupled semiconductor laser chaotic system,an intensity-coupled electro-optic chaotic system,and a phase-coupled electro-optic chaotic system are studied in detail.These systems are proposed to resist the attack strategies against the TD signature.They are proved to be effective under statistical analyzes,such as the selfcorrelation function (SF) and mutual information (MI).However,only a single output has been considered for the attack process in the existing research.We demonstrated that the TD signature can still be extracted by analyzing the mutual statistical relationship between

the

different

output

signals

which

are

generated

simultaneously by the coupled system.Furthermore,we find that the