在分析实际频率分辨光学开关(FROG)迹线噪声来源的基础上, 设计了一种合理的去噪程序; 对含模拟噪声的FROG 迹线分别进行直接重建和去噪后重建, 两者均方值误差相差一个数量级, 证明了该去噪程序的有效性; 搭建了FROG系统, 获得了实际脉冲的FROG迹线, 通过对直接重建和去燥后重建的结果进行对比分析, 发现去噪后重建的脉冲更接近真实的脉冲, 证明了噪声处理的必要性。

Based on the analysis of noise sources in the practical frequency-resolved optical gating (FROG) traces, a reasonable program to remove noises is designed. The direct reconstruction and the reconstruction after noise removing are conducted for the FROG traces with the analogue noises, respectively. The root-mean-square error of the latter is lower by one order of magnitude than that of the former, which confirms that this noise-removing program is effective. The FROG system is set up and the FROG trace of a practical pulse is obtained. By analyzing and comparing the results obtained from these two reconstruction ways, it is found that the reconstructed pulse obtained by the noise removing way is much closer to the real pulse, which verifies the necessity of noise removing.