Title :
Combination of beam propagation method and finite element method for optical beam propagation analysis
Author :
Yoneta, Susumu ; Koshiba, Masanori ; Tsuji, Yasuhide
Author_Institution :
Div. of Electron. & Inf. Eng., Hokkaido Univ. Sapporo, Japan
fDate :
11/1/1999 12:00:00 AM
Abstract :
A combined method of the beam propagation method (BPM) and the finite element method (FEM) is proposed for the analysis of reflections of both transverse electric (TE) and transverse magnetic (TM) polarized waves in waveguiding structures containing longitudinal discontinuities. BPM based on FEM is applied to slowly varying regions, and FEM is applied only to regions including abrupt discontinuities. In order to avoid nonphysical reflections from computational window edges, the perfectly matched layer boundary condition is introduced. To show the validity and usefulness of the present approach, numerical examples for an optical directional coupler and a beam splitter are presented
Keywords :
light propagation; light reflection; optical beam splitters; optical directional couplers; optical waveguide theory; abrupt discontinuities; beam propagation method; beam splitter; computational window edges; finite element method; longitudinal discontinuities; optical beam propagation analysis; optical directional coupler; perfectly matched layer boundary condition; reflections; slowly varying regions; transverse electric polarized waves; transverse magnetic polarized waves; waveguiding structures; Boundary conditions; Directional couplers; Finite element methods; Magnetic analysis; Optical beams; Optical propagation; Optical reflection; Optical waveguides; Perfectly matched layers; Tellurium;
Journal_Title :
Lightwave Technology, Journal of
