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在色噪声间的关联程度受时间周期调制的激光系统中,研究噪声受信号调制情况下的随机共振.用线性化近似的方法计算了光强关联函数及信噪比.具体讨论信噪比随噪声强度、噪声自关联时间、信号频率以及时间周期调制频率的变化关系.发现一种新的随机共振:信噪比随时间周期调制频率的变化出现周期振荡型随机共振;发现广义随机共振:信噪比随抽运噪声自关联时间的变化、随信号频率的变化出现随机共振;同时也存在典型的信噪比随噪声强度的变化而出现的随机共振.而信噪比随量子噪声自关联时间的变化表现为抑制.
In the laser system whose correlation degree of color noises is modulated by time period, we study the stochastic resonance when the noise is affected by the signal modulation.The light intensity correlation function and the signal-to-noise ratio are calculated by the method of linear approximation. Noise intensity, the correlation of noise self-correlation time, signal frequency and time-period modulation frequency.We found a new stochastic resonance: Periodic-oscillation stochastic resonance of signal-noise ratio changes with time-period modulation frequency; The noise ratio changes with the variation of the signal frequency with the variation of the pump noise self-association time, and there is also the stochastic resonance of the typical signal-to-noise ratio with the change of the noise intensity.While the SNR varies with the quantum noise self-association time The change showed inhibition.