Suppression of Chaos Time Delay Signature in a Ring Network Consisting of Three Semiconductor Lasers Coupled With Heterogeneous Delays
Suppression of Chaos Time Delay Signature in a Ring Network Consisting of Three Semiconductor Lasers Coupled With Heterogeneous Delays
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DOI：
10.1109/jlt.2016.2597865
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发表时间：
2016-09
影响因子：
4.7
通讯作者：
S. Xiang;A. Wen;W. Pan;Lin Lin-Lin;Huixing Zhang;Hao Zhang;Xingxing Guo;Jiafu Li
中科院分区：
文献类型：
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作者：
S. Xiang;A. Wen;W. Pan;Lin Lin-Lin;Huixing Zhang;Hao Zhang;Xingxing Guo;Jiafu Li
数值研究了由三个相互耦合的半导体激光器（MCSL）组成的环形网络中的混沌时间延迟特征（TDS）特性，提出了非均匀耦合延迟的概念，以获得宽参数范围内TDS对强度混沌的隐藏.比较了具有相同耦合延迟和具有不同耦合延迟的环形网络的TDS模式的演变，这些模式通过自相关函数量化。通过分析耦合强度、频率失谐和注入电流对TDS的影响，确定了TDS隐藏的参数范围。结果表明，在注入电流和耦合强度对TDS影响较大，而对频率失谐影响不大的环形网络中，可以产生具有良好TDS隐藏性的强度混沌.特别地，较大的注入电流和较小的耦合强度是优选的，以获得具有低TDS的混沌。此外，与具有相同耦合延迟的环形网络相比，具有异质耦合延迟的环形网络允许在更宽的参数区域内更好地隐藏TDS，因此，对于基于混沌的随机比特发生器是非常理想的。
The properties of chaos time delay signature (TDS) in a ring network consisting of three mutually coupled semiconductor lasers (MCSLs) are investigated numerically, where heterogeneous coupling delays are proposed to obtain the TDS concealment from the intensity chaos in wide parameter regions. The evolution of the TDS patterns, which are quantified via the autocorrelation function, for a ring network with identical coupling delays as well as that with heterogeneous coupling delays is compared. By analyzing the effects of the coupling strength, frequency detuning, and injection current on the TDS, the parameter regions for successful TDS concealment are identified. It is found that the intensity chaos with a desirable TDS concealment can be generated in the proposed ring network in which the TDS is mainly affected by the injection current and coupling strength, but is not so sensitive to the frequency detuning. In particular, a larger injection current and smaller coupling strength are preferable to obtain chaos with a low TDS. Besides, the ring network with heterogeneous coupling delays allows for better TDS concealment in much wider parameter regions, compared to that with identical coupling delays, and, thus, is highly desirable for the chaos-based random bit generators.