关联色噪声驱动的单模激光的光强关联时间  

Intensity correlation time of a signle-mode laser driven by two colored noises with cross-correlation

作　　者：陈黎梅[1] 曹力[2] 吴大进[2] 

机构地区：[1]深圳大学物理教育系,广东深圳518060 [2]华中科技大学物理系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2005年第8期116-118,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10275025)

摘　　要：采用线性化近似,计算了加性信号调制下色泵噪声和色量子噪声驱动的单模激光增益模型的光强关联时间,发现当两噪声间互关联程度λ<0时,光强关联时间T随量子噪声强度D和泵噪声强度Q的变化曲线中出现极小值(即出现抑制);当λ≥0时,光强关联时间T随量子噪声强度D和泵噪声强度Q的增加而单调增加.同时还分析了参数τ,γ,Ω对T-D和T-Q曲线的影响,发现当λ<0时,随着噪声关联时间τ的增大,T-D和T-Q曲线的极小值升高,极小值位置基本不变;随着信号频率Ω的增大,T-D和T-Q曲线的极小值略有增加,极小值位置基本不变;随着衰减系数γ的增大,T-D和T-Q曲线的极小值略有下降,极小值位置基本不变.By using the linear approximation method, the intensity correlation time T was studied for gainnoise model of a single-mode laser driven by colored pump noise and colored quantum noise with an additive modulation signal. It was detected that there is minimum （i. e. suppression） in the curves of the intensity correlation time T versus the noise intensities D and Q when the noise correlation coefficient λ 〈 0 ; and the intensity correlation time T increases monotonously with the increase of the noise intensities D and Q when λ≥0. The effect of the cross-correlation time r, the signal frequency Ω and the attenuation coeffi-cient γ on the T-D and T-Q curves were analyzed. It is found that when λ〈 O, with the increase of λ, the value of the minimum increases and the position of the minimum almost do not change; and with the increase the value of minimum increase appreciably and the position of the minimum almost do not change;and with the increase of γ, the value of minimum decreases appreciably and the position of the minimum almost do not change.

关 键 词：激光 加性信号调制 光强关联时间 线性化近似 

分 类 号：O414[理学—理论物理]