Combination of beam propagation method and mode expansion propagation method for bidirectional optical beam propagation analysis

Author

Hayashi, Kohtaro ; Koshiba, Masanori ; Tsuji, Yasuhide ; Yoneta, Susumu ; Kaji, Ryosaku

Author_Institution

Div. of Electron. & Inf. Eng., Hokkaido Univ., Sapporo, Japan

Volume

16

Issue

11

fYear

1998

fDate

11/1/1998 12:00:00 AM

Firstpage

2040

Lastpage

2045

Abstract

A combined method of the beam propagation method (BPM) and the mode expansion propagation method (MEPM) 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 the finite-element method (FEM) is applied to slowly varying regions and MEPM is applied only to regions including abrupt discontinuities. FEM is also utilized for evaluating the eigenmodes necessary for the MEPM analysis. To show the validity and usefulness of the present approach, numerical examples for a semiconductor laser facet with antireflection coating and an optical directional coupler are presented

Keywords

antireflection coatings; finite element analysis; optical directional couplers; optical films; optical waveguide theory; semiconductor lasers; waveguide lasers; BPM; FEM; TE polarised waves; TM polarized waves; abrupt discontinuities; antireflection coating; beam propagation method; directional optical beam propagation analysis; eigenmodes; finite-element method; longitudinal discontinuities; mode expansion propagation method; optical directional coupler; reflections; semiconductor laser facet; slowly varying regions; waveguiding structures; Coatings; Directional couplers; Finite element methods; Magnetic analysis; Optical beams; Optical propagation; Optical reflection; Optical waveguides; Semiconductor lasers; Tellurium;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.730368

Filename

730368