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本文提出了一种分步有限元法（ＳＳＦＥＭ），该方法可用于在时域内计算光脉冲在光波导内的传播。它同目前所用的差分方法相比，避免了累积误差，计算精度较高。文中还对几个例子作了计算。
This paper presents a step-by-step finite element method (SSFEM) that can be used to calculate the propagation of light pulses within an optical waveguide in the time domain. It is compared with the current differential method to avoid the cumulative error, high accuracy. The article also calculated a few examples.