By simulating the TM mode of a real Mach-Zehnder waveguide, the influence of various parameters on the loss was analyzed.The results show that this method is accurate, stable and easy to program.

• 结果表明：泰勒级数展开法具有精度高、稳定性好、算法简单、易于编程等优点，是一种比较理想的光波导数值分析方法，可为聚合物电光调制器的设计制作提供理论参考。