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，发现耦合的性质对激光场涨落影响较大。噪声之间的正耦合会延缓强度相关函数的衰减，增强激光系统的统计涨落。噪声之间的负耦合能抑制激光系统的统计涨落，提高激光场的相干性，使激光系统由随机过程向确定过程过渡 The one-dimensional laser model with coupling effect between additive noise and doubled noise is theoretically analyzed. It is found that the coupling property has a great influence on the fluctuation of laser field. The positive coupling between the noise delays the attenuation of the intensity-dependent function and enhances the statistical fluctuations of the laser system. The negative coupling between the noise can restrain the statistical fluctuation of the laser system, improve the coherence of the laser field, and make the laser system transit from the random process to the definite process