Fig. 1. Scheme of Offner stretcher.Offner型展宽器的结构与光路图

Fig. 2. Scheme of Martinez Stretcher.Martinez型展宽器的结构与光路图

Fig. 3. Analytical dispersion results of Offner and Martinez stretcher: (a) GD; (b) GDD; (c) TOD; (d) FOD.Offner型与Martinez型展宽器700−900 nm的解析计算色散曲线　(a) GD; (b) GDD; (c) TOD; (d) FOD

Fig. 4. (a) GDD of Offner stretcher; (b) GDD of Martinez stretcher; (c) FOD of Offner stretcher; (d) FOD of Martinez stretcher. Blue solid lines in the figure are analytical results; red dotted lines are numerical results with step of 0.1 nm; black dash lines are numerical results with step of 5 nm.(a) Offner型展宽器的二阶色散值; (b) Martinez型展宽器的二阶色散值; (c) Offner型展宽器的四阶色散值; (d) Martinez型展宽器的四阶色散值. 图中蓝色实线为解析计算值, 红色点线是步长为0.1 nm的数值计算值, 黑色虚线是步长为5 nm的数值计算值

Table 1. Structural parameters of Offner and Martinez stretchers.