色噪声驱动下调幅波的单模激光随机共振  

Stochastic resonance of amplitude modulation wave in single-mode laser driven by color noises

作　　者：张良英[1] 曹力[2] 金国祥[3] 

机构地区：[1]襄樊学院物理系,襄樊441053 [2]华中科技大学激光技术国家重点实验室,武汉430074 [3]武汉工程大学计算机学院,武汉430073

出　　处：《物理学报》2007年第9期5093-5097,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10275025);湖北省教育厅重点科研基金(批准号:D200725001)资助的课题.~~

摘　　要：对单模激光增益模型的光强方程加入调幅波,用线性化近似方法计算了以e指数形式关联的两色噪声驱动下光强的输出功率谱及信噪比.结果表明噪声间互关联时间及互关联程度对随机共振影响很大,信噪比随着载波信号频率ω和调制信号频率Ω的变化也和白噪声的变化曲线有很大不同.By adding modulation wave to the equation of the laser intensity in the gain-noise model of the single-mode laser, 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 color noises correlated in the form of exponential function. The result shows that the correlated time and the correlated strength between the noises have great effect on the stochastic resonance（SR）, and the variations of SNR with the frequency of the carrier signal ω and the modulator signal Ω are quite different from the curve of variation of white noise.

关 键 词：色噪声 单模激光 随机共振 调幅波 

分 类 号：TN241[电子电信—物理电子学]