A three-dimensional beam propagation method based on the Galerkin method (3D-GM-BPM) is proposed for directly modeling a parallel directional coupler based on optical rib waveguides.

• 摘要提出了基于伽辽金法的三维光束传播法(3D-GM-BPM)，可直接应用于三维波导光电子器件的光波传输模拟，并用它模拟分析了基于脊形光波导的平行定向耦合器的光波传输特性。