色关联噪声驱动下双模激光随机共振  

Stochastic resonance in a two-mode laser system driven by colored cross-correlation noises

作　　者：汪志云[1] 陈培杰[1] 张良英[1] 

机构地区：[1]湖北文理学院物理与电子工程学院,襄阳441053

出　　处：《物理学报》2014年第19期113-119,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11045004);湖北省教育厅科研基金重点项目(批准号:D20132603)资助的课题~~

摘　　要：运用线性近似方法,计算得到了关联色噪声和输入周期信号作用下双模激光增益模型输出信号光强的功率密度谱和信噪比,讨论了信噪比随系统参数的变化关系.研究结果发现:在系统的参数和输入信号的频率满足一定条件时,信噪比不仅随噪声强度变化出现了传统的随机共振现象,还发现其随自饱和系数c2、输入信号频率°及交叉耦合参数b的变化都出现了随机共振.Considering a gain-noise model for two-mode laser system driven by a periodic signal and two-color cross-correlation noises, we calculate the power spectrum and signal-to-noise ratio（SNR） of an output signal by means of linear approximation method, and discuss the influence of the system coefficients on SNR. Results show that under a certain condition satisfied by the coefficients of the system and input signals, the stochastic resonance phenomenon may be detected in the evolution of SNR, and also at certain intensities of noise, saturation coefficient c2, cross coupling coefficient b, and input signal frequency Ω.

关 键 词：色噪声 双模激光 信噪比 随机共振 

分 类 号：TN24[电子电信—物理电子学]