Bidirectional Beam Propagation Method Based on Axi-Symmetric Full-Vectorial Finite Element Method

We first present a bidirectional beam propagation method (BiBPM) based on axially symmetric full-vectorial finite element (Axi-FVFEM). The Axi-FVFEM BiBPM is more versatile than previous scalar for axi-symmetric structure. It has potential to offer efficient analysis widely used FEM or difference techniques, especially large scale waveguide such as long periodic An air gap in an and fibre Bragg grating (FBG) are analyzed using the numerical validation, we compare results with those of 3D finite-difference time-domain (FDTD) modal-based method.