半导体激光器混沌光电延时负反馈控制方法研究

Controlling chaos in a semiconductor laser via photoelectric delayed negative-feedback

提出半导体激光器混沌光电延时反馈控制方法.通过附加一个光电延时电路控制系统,建立了三个有光电延时反馈条件下的注入激光混沌控制物理模型.进行了有控制时的最大Lyapunov指数分析.数字仿真发现,当调节延时时间和反馈光电流时,能控制激光混沌到3周期态、5周期态等;当周期键控光电流时,能控制激光混沌到8周期态、9周期态等;最后,通过组合应用光电延时反馈控制电路系统与附加周期调制驱动电流时,能有效地控制激光混沌到单周期态以及其他周期态.

In this paper, methods of chaos-control of a semiconductor laser are studied using a photoelectric delayed negative-feedback scheme with additive photoelectric delayed control, and the maximum Laypunov exponent of the controlled system is analyzed. Three physical models of photoelectric delayed chaos-control of an injected semiconductor laser are presented. Firstly, by adjusting the delay time or the feedback photocurrent, the chaotic laser can be conducted into period-3 state, period-5 or other multi-periodic states. Secondly, by periodic modulation of the photocurrent into the laser, the chaotic laser can be brought into a period-8 states or a period-9 state. Lastly, we make use of the photoelectric delayed negative-feedback and an additive current modulation to perform chaos-control, the chaotic laser can be stabilized into a single,periodic state or multi-periodic state.