延时光电反馈法实现半导体激光器的混沌控制  

Chaotic Control in Semiconductor Laser with Time-Delayed Opto-Electronic Feedback

作　　者：王彦斌[1,2] 张胜海[2] 米朝伟[2] 王伟[2] 

机构地区：[1]国防科技大学光电科学与工程学院,湖南长沙410073 [2]信息工程大学理学院数理系,河南郑州450001

出　　处：《中国激光》2009年第8期1968-1972,共5页Chinese Journal of Lasers

摘　　要：采用延时光电反馈法实现了半导体激光器的混沌控制。首先通过数值计算激光器的动力学方程,绘制了系统的最大李雅普诺夫(Lyapunov)指数随注入电流调制强度的变化曲线,确定了激光器处于混沌态的参数区间[0.51,0.60]。然后利用延时光电反馈方案实现了激光器的混沌控制。数值模拟表明,这种方案能够实现两类不同的混沌控制。第一,能将系统由混沌态控制到其固有的周期态,这类控制不改变系统原有的动力学行为;实现稳定控制以后,控制信号可以趋近于零,激光器的周期输出不需要控制信号来维持;第二,能将系统由混沌态控制到新的周期态,这类控制改变系统原有的动力学行为;实现稳定控制以后,控制信号不可以趋近于零,激光器的周期输出需要控制信号来维持。A method of time-delayed opto-electronic feedback control is applied to chaotic control in semiconductor laser. It can determine the parameter range of [0.51, 0.60] for the laser being chaos state by plotting the system＇s maximal Lyapunov exponent varying with the current-modulated intensity by numerical calculation of laser＇s dynamic equations. And it is realized for chaotic control of the laser by the scheme of time-delayed opto-electronic feedback. Numerical stimulation shows that the scheme can achieve two kinds of different chaotic control. It can change the system from chaos into intrinsic periodic state. The controlling signal can approach zero after control achieving, and the laser＇s periodic outputs donot need the existence of the controlling signal. It can as well change the system from chaos into new periodic state. The controlling signal cannot approach zero after control achieving, and the laser＇s periodic outputs need the existence of the controlling signal.

关 键 词：非线性光学 混沌控制 延时光电反馈法 半导体激光器 

分 类 号：TN248.4[电子电信—物理电子学] O415.5[理学—理论物理]