Three-dimensional finite difference simulation of coupling behavior and loss in multimode interference devices

Author

Weinert, C.M. ; Agrawal, N.

Author_Institution

Heinrich-Hertz-Inst. fur Nachrichtentech. Berlin GmbH, Germany

Volume

7

Issue

5

fYear

1995

fDate

5/1/1995 12:00:00 AM

Firstpage

529

Lastpage

531

Abstract

A three-dimensional finite difference method scheme for simulation of multimode interference couplers with arbitrary waveguide cross section is presented. With this method we investigate the influence of the multimode waveguide spectrum and of the access waveguide position on 3-dB coupling. These effects, which were not considered in previous theories on multimode interference structures, are shown to be important for the design of dielectric multimode waveguide devices. Taking these effects into account, fabrication tolerant 3-dB couplers with low insertion loss can be designed.<>

Keywords

finite difference methods; light interference; optical couplers; optical losses; optical waveguide theory; simulation; 3D finite difference simulation; access waveguide position; arbitrary waveguide cross section; coupling behavior; dielectric multimode waveguide devices; fabrication tolerant 3-dB couplers; insertion loss; interference couplers; multimode interference devices; multimode waveguide spectrum; Couplers; Dielectric devices; Fabrication; Finite difference methods; Insertion loss; Interference; Optical losses; Signal processing; Waveguide discontinuities; Waveguide theory;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.384533

Filename

384533