Li Qiliang, Lu Shanshan, Bao Qi, Chen Dewang, Hu Miao, Zeng Ran, Yang Guowei, Li Shuqin
Appl Opt. 2018 Jan 10;57(2):251-257. doi: 10.1364/AO.57.000251.
In this paper, we propose a chaos-based scheme allowing for trilateral communication among three mutually coupled chaotic semiconductor lasers. The coupling through a partially transparent optical mirror between two lasers induces the chaotic dynamics. We numerically solve the delay rate equations of three lasers and demonstrate that the dynamics is completely synchronous. Herein, each laser is not only a transmitter but a receiver; three different messages are encoded by simultaneously modulating bias current of the three lasers. By monitoring the synchronization error between transmitter and receiver, and comparing the error with the message of the local laser, we can decipher the message of the sender. The investigation indicates that these messages introduced on the two ends of each link among three lasers can be simultaneously transmitted and restored, so the system can realize simultaneous trilateral communication. In this scheme, an eavesdropper can monitor the synchronization error, but one has no way to obtain the bits that are being sent, so the trilateral communication is secure.
在本文中，我们提出了一种基于混沌的方案，该方案允许三个相互耦合的混沌半导体激光器之间进行三边通信。通过部分透明光学镜在两个激光器之间的耦合诱导了混沌动力学。我们对三个激光器的延迟速率方程进行了数值求解，并证明了动力学是完全同步的。在此，每个激光器不仅是一个发射器，也是一个接收器；通过同时调制三个激光器的偏置电流来编码三种不同的消息。通过监测发射器和接收器之间的同步误差，并将该误差与本地激光器的消息进行比较，我们可以解密发送方的消息。研究表明，在三个激光器之间每个链路两端引入的这些消息可以同时传输和恢复，因此该系统可以实现同时三边通信。在该方案中，窃听者可以监测同步误差，但无法获取正在发送的比特，因此三边通信是安全的。
