用延时注入-反馈法实现掺铒光纤激光器的混沌同步

Chaotic Erbium-doped Fiber Lasers Achieving Synchronization by Delay Injection-feedback

采用延时注入-反馈法研究了两个双环掺铒光纤激光器的混沌/超混沌同步.数值模拟表明,只要延时时间和反馈强度合适,两个相同的双环掺铒光纤激光器无论处于混沌状态还是处于超混沌状态,都可以很容易达到同步,即使两个激光器不完全相同,只要适当增大反馈强度,也可以实现两个激光器的混沌/超混沌同步.同时由于延时时间的不同,两个激光器还会出现延时同步,这种延时正好解决了远程通讯中的信号延时效应,因此对于混沌保密通讯也有利.

We investigated the chaotic/hyperchaotic synchronization of two erbium-doped fiber dual-ring lasers using delay injection-feedback. The numerical simulation shows that the two same erbium-doped fiber dualring lasers can easily achieve synchronization even though they are chaotic or hyperchaotic only if the delay time and intension of feedback are suitable, even if two lasers are not completely uniform, they also achieve chaotic/hyperchaotic synchronization only if the intension of feedback is suitably added. At the same time, the two lasers show delay synchronization for different delay time, this delay synchronization just account for the delay effect in telecommunication and is available for chaotic secure communication.