对最小色散单模阶跃指数光纤维进行准确的分析和近似的设计方法,已有文献报道。本文介绍一种精确的设计方法和近似的分析方法;对上述四种程序的计算结果、纤芯半径和光源的波长进行了比较。结果表明,近似法的误差小于百分之几。而且严格地对算法进行试验时,证明了计算方法的准确性 Accurate analysis and approximate design method for the minimum dispersion single-mode step index optical fiber has been reported in the literature. This article presents an accurate design method and an approximate analysis method. The calculation results of the above four programs, the core radius and the wavelength of the light source are compared. The results show that the approximation error is less than a few percent. And when the algorithm is strictly tested, the accuracy of the calculation method is proved