基于外部光反馈注入垂直腔面发射激光器(VCSEL)的混沌偏振系统以及线性电光调制理论,提出了一种可重构的光电混沌逻辑门实现方案,并给出了具体的物理模型。首先,通过计算确定VCSEL输出光为混沌态时的参数空间,如外加电场、光反馈强度。然后,将外加电场调制为门控因子,光反馈强度调制为逻辑输入,逻辑输出采用阈值机制进行解调。当逻辑输入与门控因子满足不同逻辑运算关系时,系统就能灵活切换不同的混沌逻辑门,如AND、NAND、OR、NOR、XOR和XNOR。

Based on the chaos polarization system of external optical feedback injection vertical cavity surface emitting laser (VCSEL) and the theory of linear electro-optic modulation, a reconfigurable opto-electronic chaotic logic gate is proposed and its physical model is given in this paper. First, the parameter space, such as applied electric field and optical feedback intensity, is determined when VCSEL output light is chaotic state. Then, the external electric field is modulated as the gating factor, the optical feedback intensity is modulated as the logic input, and the logic output is demodulated by threshold mechanism. When the logic input and gating factor satisfy different logic operation relations, the system can switch different chaotic logic gates flexibly, such as AND, NAND, OR, NOR, XOR, and XNOR.