Asymmetric power coupling in grating-assisted couplers

Author

Hong, J. ; Huang, W.-P.

Author_Institution

Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada

Volume

142

Issue

2

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

103

Lastpage

108

Abstract

Asymmetric power coupling in grating-assisted coupler filter is revealed analytically for the first time by coupled-mode theory. An optimum grating period is then proposed and various coupling lengths for maximum power transfer and minimum crosstalk between two waveguides are derived analytically. Comparisons between coupled-mode theory and the vector beam propagation method have been made for possible scenarios of power exchange between the two waveguides. Excellent agreement between them indicates that the coupled-mode theory shown in the paper is able to not only reveal all the physics embedded in the complicated coupling processes, but also predict various possible filtering responses accurately

Keywords

coupled mode analysis; diffraction gratings; optical couplers; optical crosstalk; optical waveguide filters; optical waveguide theory; asymmetric power coupling; coupled-mode theory; coupling lengths; filtering responses; grating-assisted couplers; maximum power transfer; minimum crosstalk; optimum grating period; power exchange; vector beam propagation method; waveguides;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:19951546

Filename

386325