Aiming at the structure and refractive-index profile of waveguide, the waveguide optical field distribution has been calculated by the Generalized Douglas (GD) scheme.

• 本文针对波导的结构及折射率分布,运用基于道格拉斯算子的宽角多步有限差分光束传播法模拟波导的传输特性,数值计算出波导中的光场的分布。