本文从理论上对加性噪声和倍增噪声之间有耦合作用的一维激光模型进行了分析，求出定态时激光强度分布函数的解析形式．同噪声之间不存在耦合的激光模型相比较，噪声之间的耦合增强了激光强度的涨落． In this paper, a one-dimensional laser model with coupling effect between additive noise and doubled noise is theoretically analyzed, and the analytical form of laser intensity distribution function in steady state is obtained. Coupling between the noise enhances the fluctuation of the laser intensity as compared with a laser model in which there is no coupling between noises.