光纤激光器延时反馈的动态特性与复杂度研究

Dynamical behaviors and complexity of erbium-doped fiber dualring laser with time delay feedback

摘要:

基于双环掺Er3+光纤激光器,提出一种输出变量延时自反馈混沌控制的模型。通过加入可变光延时器和光耦合器控制光纤激光器的输出状态,系统输出信号经历了周期态、多周期态和混沌态。利用排列熵算法,研究光纤激光器输出信号复杂度随反馈延时时间的变化趋势。与分岔图相比较后发现,系统复杂度的变化更能准确地检测系统的动态行为,而且能区分不同的周期态以及夹杂在混沌状态中极窄的周期窗口;加入延时反馈后,系统输出混沌信号的复杂度增大。利用排列熵方法不仅可以观察系统动力学行为,而且给出了输出混沌信号复杂度的量化标准。

Abstract:

Based on the theoretical model of time delayed erbium-doped fiber dual-ring laser system,a method to control chaotic behavior is presented by using variable photonics time delay and couplers.Numerical results show that the fiber laser can exhibit periodic states,multi-periodic states and chaos states by adjusting the feedback time delay and feedback coefficient.The permutation entropy is further introduced to investigate the complexity property of the fiber laser output,and the results not only ...