调频信号的单模激光线性模型随机共振

对单模激光增益模型的光强方程加入调频信号，用线性化近似方法计算了以δ函数形式关联的两白噪声驱动下光强的输出功率谱及信噪比. 结果表明，信噪比随抽运噪声和量子噪声强度的变化可出现典型随机共振，受调制信号振幅的影响，信噪比随载波信号频率和调制信号频率的变化出现抑制、单调上升、共振、抑制和共振等几种情况. 关键词：抽运噪声单模激光随机共振调频信号

Stochastic resonance of frequency modulated signals in a linear model of single-mode laser

By adding frequency modulated signal to the equation of the laser intensity of the gain-noise model of the single-mode lasers, we use the linear approximation method to calculate the power spectrum and signal-to-noise ratio (SNR) of the laser intensity, which is driven by two white noises correlated in the form of δ function. The result shows that the SNR shows typical stochastic resonance with the change of intensities of the pump noise and quantum noise. As the amplitude of a modulated signal has an effect on the SNR， it shows suppression, monotonic increase, resonance, suppression and resonance and so on， with the varing of the frequencies of the carrier signal and modulated signal.