Joint Research Institute for Integrated Systems, Department of Electrical, Electronic & Computer Engineering, Heriot-Watt University, Riccarton, Edinburgh, UK.
Opt Lett. 2011 Nov 15;36(22):4326-8. doi: 10.1364/OL.36.004326.
We propose and experimentally demonstrate a 40 Gb/s secure optical communication system with on-off-keying (OOK) modulation format by using a time domain spectral phase en/decoding scheme, which employs a highly dispersive element and high-speed phase modulator for introducing significant symbol overlapping for both the encoded and incorrectly decoded noiselike signals to enhance the information security against eavesdropping using a power detector. The influence of dispersion and chip modulation rate on the symbol overlapping of the incorrectly decoded signal has been analytically investigated and experimentally verified. Security enhancement for 40 Gb/s OOK data using fast reconfigurable 40 Gchip/s optical codes with code lengths of up to 1024 has been demonstrated and compared with a 10 Gb/s system.
我们提出并实验演示了一种基于开关键控（OOK）调制格式的 40 Gb/s 安全光通信系统，该系统采用时域光谱相位编/解码方案，利用高色散元件和高速相位调制器引入显著的符号重叠，以增强信息安全性，防止使用功率探测器进行窃听。分析和实验验证了色散和码片调制速率对错误解码信号符号重叠的影响。使用长达 1024 位的快速可重构 40 Gchip/s 光码，对 40 Gb/s OOK 数据进行了安全增强，并与 10 Gb/s 系统进行了比较。
