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提出了半导体激光器混沌相位共轭反馈(PCF)控制方法,建立了相位共轭反馈控制条件下激光器电流激发混沌的物理模型,发现其混沌控制物理机制是相位共轭反馈影响改变了激光器非线性增益和线宽增强因子特性,控制了系统的动力学行为及频率特性,其影响程度与反馈系数、延迟时间和光线宽增强因子等有关。数值模拟结果表明,在不同强度的光反馈下,通过调节相位共轭反馈光的延迟时间可以控制混沌激光到周期态、双周期态、多周期态等;发现相位共轭反馈控制特点是反馈光场和输出激光处于相干增强状态去实现混沌控制,且能控制实现激光器功率增强的周期脉冲输出。
The control method of chaotic phase conjugate feedback (PCF) of semiconductor laser is proposed. The physical model of chaotic laser current excited by phase conjugate feedback control is established. The physical mechanism of chaotic control is found that the influence of phase conjugate feedback changes the laser non-linear gain And linewidth enhancement factor, which control the dynamic behavior and frequency characteristics of the system. The influence degree is related to the feedback coefficient, delay time, and the light broadening enhancement factor. The numerical simulation results show that the chaotic laser can be controlled to the periodic, bi-periodic and multi-periodic states by adjusting the delay time of the phase conjugate feedback light under the light feedback with different intensities. The phase conjugate feedback control is characterized by feedback light The field and the output laser are coherently enhanced to achieve chaos control and can control the periodic pulse output that achieves laser power enhancement.