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Zero-lag chaos synchronization properties in a hierarchical tree-type network consisting of mutually coupled semiconductor lasers

机译：由相互耦合的半导体激光器组成的分层树型网络中的零滞后混沌同步属性

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摘要

Chaos synchronization properties in a novel hierarchical tree-type optical network consisting of semiconductor lasers (SLs) are investigated numerically. In such network, each child node is asymmetrically mutually coupled with the parent node. Zero-lag synchronization is found among the nodes belonging to the same layer, while the nodes belonging to different layers are not synchronized, which is denoted as hierarchical chaos synchronization (HCS). The effects of injection strength, asymmetrical injection parameters, bias currents and frequency detuning on the performance of HCS and chaotic complexity are studied in detail. Our results show that high-quality HCS can be obtained under moderate parameters. The stability of the network is also investigated systematically. Further, we explore the robustness of HCS by considering an asymmetrical network. Finally, output bit streams are generated from each SL at a tunable rate of up to about 10 Gbps with verified randomness. These results are enlightening to the multi-user chaotic communication and the synchronization mechanism in biological neuronal networks.
机译：在数值上研究了由半导体激光器（SLS）组成的新型分层树型光网络中的混沌同步性质。在这样的网络中，每个子节点与父节点相互对称地耦合。在属于同一层的节点中找到零滞后同步，而属于不同层的节点则不同步，其表示为分层混沌同步（HCS）。详细研究了注射强度，不对称注射参数，偏置电流和频率静脉的偏置电流和频率静脉的影响。我们的结果表明，高质量的HCS可以在适度的参数下获得。还系统地调查了网络的稳定性。此外，我们通过考虑不对称网络来探索HCS的鲁棒性。最后，输出比特流由每个SL以高达约10Gbps的可调谐速率生成，具有验证的随机性。这些结果是对生物神经网络中的多用户混沌通信和同步机制的启示。

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