高速多量子阱激光器混沌保密通信系统研究

研究了外部光注入高速多量子阱激光器激光混沌全光保密通信系统，导出系统同步方程，理论证明并数值实现了系统的同步，分析了增加反馈系数以缩短同步时间且增强系统同步稳定性的方法。研究分析了多量子阱激光器混沌隐藏和混沌键控保密通信全光调制解调系统模型，数值模拟了具有正弦调制信号的调制频率0．2GHz混沌模拟保密通信和数字信号调制速率20Gb／s的混沌数字保密通信以及调制速率0．05Gb／s混沌键控保密通信的应用，系统确实具有较高的保密性能和反破译能力；分析了混沌数字信号保密通信调制带宽20Gb／s调制解调时的同步误差以及混沌键控调制速率，系统都具有非常好的调制解调特性，且在高速混沌通信中，系统解调具有相对较小的同步误差，而1Gb／s是混沌键控通信的速率上限。

High Rate Chaos Secure Communication System of Multiple-Quantum-Well Lasers

A high rate all optical secure communication scheme of chaotic multiple quantum well lasers from external injection light is studied. The system synchronization equation is derived. Synchronization is theoretically demonstrated and numerically achieved. Synchronization time is shortened and synchronization stability is boosted with the feedback coefficient increasing in numerical simulations. Models of all light chaos masking and chaos shift keying modulation demodulation with multiple quantum well lasers are investigated for secure communications, respectively. Chaos analog secure communication with a sinusoidal signal of 0.2 GHz modulation frequency, chaos digital secure communication with a digital signal of 20 Gb/s modulation rate and chaos shift keying secure communication with the modulation rate 0.05 Gb/s are numerically simulated, respectively. It is found that the system shows a good ability of robust and anti code breaking. Synchronous error is numerically calculated in chaos digital communications with the modulation bandwidth of 20 Gb/s in the modulation demodulation processes and the modulation rate characterization is analyzed to conclude that lower synchronous error under high bit rate and the maximum bit rate limit of 1 Gb/s in chaos shift keying communication.