利用两种方法研究了脉冲形状为高斯型的色散管理孤子系统定时抖动。利用微扰变分方法推导出光通信系统存在滤波器和自发辐射噪声的情况下,孤子参数演化的动力学方程,得出了定时抖动的表达式,并对其进行仿真,发现定时抖动来源于放大器噪声、频率偏移等,啁啾的符号和滤波器对系统总的定时抖动也有一定影响。再利用矩方法对色散管理孤子系统定时抖动进行了分析,两种方法得到的结果一致。 Two kinds of methods are used to study the timing jitter of the dispersion management soliton system whose pulse shape is Gaussian. The perturbation variational method is used to derive the dynamic equation of the soliton parameter evolution under the existence of the filter and the spontaneous emission noise in the optical communication system. The expression of the timing jitter is obtained and simulated. It is found that the timing jitter comes from the amplifier Noise, frequency offset, etc. The symbols and filters of the chirp have a certain impact on the total timing jitter of the system. Reusing the moment method to analyze the timing jitter of dispersion management soliton system, the results obtained by the two methods are the same.