基于延时偏振反馈控制的单环掺铒光纤激光器的混沌产生和同步

Generation and Synchronization of Chaos in Single-Ring ErbiumDoped Fiber Lasers Based on Delay Polarization Feedback Control

通过延时偏振反馈控制的方法研究了单环掺铒光纤激光器混沌的产生。通过适当地调节延迟时间、耦合系数以及偏振角,研究了单环掺铒光纤激光器系统的动力学特性,给出了混沌产生的方式及混沌态的参数区间,实现了单环掺铒光纤激光器混沌的产生。进而利用混沌信号驱动法研究单环掺铒光纤激光器的混沌同步。结果表明,在适当的驱动强度下,无论两个单环掺铒光纤激光器在被驱动前处于混沌态还是周期态,都可以达到混沌同步。并且利用关联系数分析了驱动强度和偏振角对混沌同步性能的影响。

The generation of chaos in single-ring erbium-doped fiber lasers （SREDFLs） is investigated by using the delay polarization feedback control. The dynamical characteristics of SREDFLs are studied by appropriately adjusting the delay time, the coupling coefficient, and the polarization angle. The routes of chaotic generation and the parameter ranges of the chaotic states are given. Chaotic generation is achieved in the SREDFLs. Moreover, the chaotic synchronization of two SREDFLs is investigated by using the method of chaotic signal driving. The results show that no matter the two SREDFLs are chaotic or periodic before being driven, they can realize chaotic synchronization with a suitable driving intensity. Furthermore, the influence of the driving intensity and the polarization angle on the quality of chaotic synchronization is analyzed by using the correlation coefficient.