从理论上定义了基于高斯脉冲成分分析的激光脉冲时域响应的偏离度参数，并且通过实验验证了该定义的有效性。利用高速光电探测系统测量入射和出射的微秒量级激光脉冲的实际能量分布，在3%的容差范围内对能量分布进行高斯脉冲分量拟合，通过对比各独立高斯成分的归一化强度经系统后的理想值与真实值，计算得到偏离度。在该定义下，通过分析各高斯分量的权重演化以及新分量的成因，不仅可以研究光场与系统相互作用的物理机制，而且为系统的优化设计提供帮助。

Based on the Gaussian pulse component analysis, a new deviation of laser pulse system in time-domain is defined, and its validity is further verified experimentally. The actual energy distribution of input and output optical pulses on microsecond level is gotten through high-speed photoelectric detector, and the envelops of energy distribution is fitted by Gaussian pulse components with a tolerance range of 3%. Comparing ideal values with actual values of the independent Gaussian components after getting though the system, the deviations can be calculated. According to the definition, by analyzing the changes of existed components and the causes of new components, both the physical mechanisms of optics-system interaction and the optimization of system can be studied.