A finite element beam propagation method for strongly guiding and longitudinally varying optical waveguides

Author

Tsuji, Yasuhide ; Koshiba, Masanori

Author_Institution

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

Volume

14

Issue

2

fYear

1996

fDate

2/1/1996 12:00:00 AM

Firstpage

217

Lastpage

222

Abstract

A unified finite element beam propagation method is described for both TE and TM waves propagating in strongly guiding and longitudinally varying optical waveguides with magnetooptic materials. In order to avoid nonphysical reflections from the computational window edges, the transparent boundary condition is introduced for both polarizations. In order to show the validity and usefulness of this approach, numerical examples are presented for a directional coupler composed of two parallel identical waveguides, an S-bend, a Y-branching optical isolator, and a 4-ports optical circulator. The present algorithm is, to our knowledge, the first beam propagation method for modeling nonreciprocal magnetooptic components

Keywords

finite element analysis; light polarisation; magneto-optical devices; optical circulators; optical directional couplers; optical isolators; optical waveguide theory; 4-ports optical circulator; S-bend; TE waves; TM waves; Y-branching optical isolator; beam propagation method; computational window edges; directional coupler; finite element beam propagation method; longitudinally varying optical waveguides; magnetooptic materials; nonphysical reflections; nonreciprocal magnetooptic components; parallel identical waveguides; strongly guiding optical waveguides; transparent boundary condition; Boundary conditions; Directional couplers; Finite element methods; Magnetic materials; Optical materials; Optical polarization; Optical propagation; Optical reflection; Optical waveguides; Tellurium;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.482266

Filename

482266