单模激光系统线性化近似适用范围的分析

Analyses of Valid Range for the Linear Approximation in a Single-mode Laser

采用线性化近似方法计算了具有实虚部关联的量子噪声和泵噪声驱动的单模激光损失模型的光强相对涨落 ,为了对线性化近似的适用范围进行详细的分析 ,分别讨论了量子噪声强度、泵噪声强度、量子噪声实虚部间关联系数对光强相对涨落的影响 ,得出在小噪声、远离阈值时 ,线性化近似适用范围扩大 ;小噪声、远离阈值且当量子噪声实虚部无关联时 。

Adopting the linear approximation method, the variance of the intensity is correlated in a loss model of a single mode laser driven by pump noise and quantum noise with cross correlated real and imaginary parts. Moreover, the valid range for the linear approximation method, the influences on the variance of the laser intensity by the intensities of the pump noise and quantum noise, and the cross correlation coefficient between the real and imaginary parts of the quantum noise is discussed respective. The valid range is extended in the case of small noises and far form threshold, and the valid range is the largest in case of small noises, far form threshold , and no correlation between the real and imaginary parts of the quantum noise.