一级近似下的单模激光增益模型随机共振  

Stochastic resonance in a gain-noise model of single-mode laser under the first-order approximation

作　　者：张良英[1] 金国祥[2] 曹力[3] 

机构地区：[1]襄樊学院物理与电子工程学院,襄樊441053 [2]武汉工程大学智能机器人湖北省重点实验室,武汉430073 [3]华中科技大学物理学院,武汉430074

出　　处：《物理学报》2012年第7期210-215,共6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:D20101506)资助的课题~~

摘　　要：把周期信号输入单模激光,对激光增益模型中的乘法噪声项取一级近似通过计算相关函数得到功率谱,发现输出信号是洛伦兹型的.信噪比随抽运噪声强度和量子噪声强度的变化均出现随机共振,但共振峰对应的噪声强度比零级近似下的小.By adding periodic signal into single-mode laser,and taking the first-order approximation to the multiplication noise of the laser gain-noise model,we find that the output signal is of the Lorentz type when we obtain power spectrum by calculating the correlated function.The signal-to-noise ratio shows the stochastic resonance occurs with the variations of intensities of the pump noise and quantum noise,and the noise intensity of resonant peak is smaller than that under the zeroth approximation.

关 键 词：乘法噪声 相关函数 随机共振 

分 类 号：TN241[电子电信—物理电子学]