Fig. 1. Flow chart of FROG iterative algorithm.FROG迭代算法流程图

Fig. 2. (a) Schematic of TG-FROG optical structure and phase-match condition; (b) signal pulses generated by transient-grating(a) TG-FROG光路结构和相位匹配条件示意图; (b)产生的瞬态光栅信号光

Fig. 3. Schematic diagram of the phase-matched TG-FROG apparatus.自动满足相位匹配的TG-FROG装置图　H1: 三孔光阑; H2: 小孔光阑; D1、D2: D型反射镜; M1, M2: 凹面银镜; F: 熔石英玻璃片; S: 光谱仪

Fig. 4. Results of TG-FROG measurement for Ti sapphire laser pulse: (a) Measured trace; (b) reconstructed trace; (c) spectral intensity and phase; (d) distribution of retrieved temporal intensity.TG-FROG测量钛宝石激光脉冲结果　(a)实验测量的行迹图; (b)反演计算的行迹图; (b)光谱和相位信息; (d)脉冲电场强度分布

Fig. 5. Results of SPIDER measurement for Ti sapphire laser pulse: (a) Measured spectral interferogram; (b) spectral intensity and phase; (c) distribution of retrieved temporal intensity.SPIDER测量钛宝石激光脉冲结果　(a)光谱干涉条纹; (b)光谱和相位信息; (c)脉冲电场强度分布

Fig. 6. Result of interference autocorrelator measurement for Ti sapphire laser pulse.干涉自相关仪测量钛宝石激光脉冲结果

Fig. 7. Results of TG-FROG measurement for SHG laser pulse: (a) Measured trace; (b) reconstructed trace; (c) spectral intensity and phase; (d) distribution of retrieved temporal intensity.TG-FROG测量二倍频脉冲结果　(a)实验测量的行迹图; (b)反演计算的行迹图; (b)光谱以及相位信息; (d)脉冲电场强度分布

Fig. 8. Results of TG-FROG measurement for supercontinuum laser pulse: (a) Measured trace; (b) reconstructed trace; (c) spectral intensity and phase; (d) distribution of retrieved temporal intensity.TG-FROG测量超连续光谱的脉冲结果　(a)实验测量的行迹图; (b)反演计算的行迹图; (b)光谱以及相位信息; (d)脉冲电场强度分布