偏置信号调制色抽运噪声驱动的光学双稳系统的随机共振  

Stochastic Resonance in Optical Bistable System Driven by Colored Pump Noise with Bias Signal Modulating

作　　者：张瑞芳[1] 徐大海[1] 桂堤[1] 

机构地区：[1]长江大学物理与科学技术学院,湖北荆州434023

出　　处：《长江大学学报（自然科学版）》2011年第7期5-7,276,共3页Journal of Yangtze University(Natural Science Edition)

基　　金：湖北省教育厅重点项目(D200612001;D200712002)

摘　　要：在偏置信号调制色抽运噪声驱动的光学双稳系统中,用线性化近似方法计算了系统的输出信噪比,讨论了偏置信号、噪声及其关联对输出信噪比的影响。研究发现,信噪比随抽运噪声强度和量子噪声强度变化出现随机共振现象,噪声间的关联对随机共振有极大的影响。In the optical bistable system driven by colored pump noise with the bias signal modulating,the signal-to-noise ratio(SNR) is caculated with the linear approximation method,and the influence on SNR imposed by the bias signal,noise,as well as the correlation of the noise is discussed.The stochastic resonance(SR) is observed both in the curves of the SNR versus the pump noise and the quantum noise.Besides,the great influence on the SNR imposed by the correlation coefficient is found between the pump noise and the quantum noise.

关 键 词：随机共振 光学双稳系统 偏置信号 色噪声 

分 类 号：O431.2[机械工程—光学工程]