Uchida A, Yoshimori S, Shinozuka M, Ogawa T, Kannari F
Opt Lett. 2001 Jun 15;26(12):866-8. doi: 10.1364/ol.26.000866.
We experimentally demonstrate a chaotic on-off keying method for secure communications by using chaos synchronization in two microchip lasers. The output of the microchip laser in the transmitter is externally modulated with an acousto-optic modulator at ~4 MHz . One encodes a digital message in the chaotic carrier by turning the modulation on and off at 100 kHz. Because the accuracy of synchronization for the slave laser in the receiver tends to be degraded in the presence of external modulation in the injection laser signal, one can distinguish two binary states. The digital message can be recovered as an envelope of the chaotic oscillation when the difference between the two laser outputs of the transmitter and the receiver is calculated.
我们通过在两个微芯片激光器中使用混沌同步，实验证明了一种用于安全通信的混沌开关键控方法。发射端微芯片激光器的输出由一个约4MHz的声光调制器进行外部调制。通过以100kHz的频率开启和关闭调制，将数字信息编码到混沌载波中。由于在注入激光信号中存在外部调制时，接收端从激光器的同步精度往往会降低，因此可以区分两种二进制状态。当计算发射端和接收端两个激光输出之间的差值时，数字信息可以作为混沌振荡的包络被恢复。
