脉冲信号被噪声调制的单模激光随机共振

Stochastic resonance for pulse signal modulated by noise in a single-mode laser system

建立了一个脉冲信号受噪声调制的新型的单模激光随机共振模型,采用线性化近似的方法计算了相应的光强关联函数和系统的输出信噪比,并详细讨论了相应的随机共振现象.研究结果表明:由于噪声调制脉冲信号,使得单模激光表现出崭新的随机共振现象,即通过改变脉冲信号周期T来实现抑制或优化输出信噪比的目的.

A new model of stochastic resonance, in which the pulse signal is modulated by noise, is established for a single-mode laser system. The corresponding intensity correlation function and the output signal-to-noise ratio of the system are calculated in the linear approximation. The phenomena of stochastic resonance are thoroughly discussed. Results reveal that due to the pulse signal modulated by noise, the single-mode laser exhibits a novel stochastic resonance phenomenon, that is, the optimization or the restraint of output signal-to-noise ratio can be controlled by the adjustment of the pulse signal period T.