A new approach to grating-assisted couplers

Author

Huang, Weiping ; Little, Brent E. ; Chaudhuri, Sujeet K.

Author_Institution

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

Volume

9

Issue

6

fYear

1991

fDate

6/1/1991 12:00:00 AM

Firstpage

721

Lastpage

727

Abstract

A novel approach to the analysis and design of grating-assisted directional couplers is proposed. Power exchange between the waveguides is maximized through phase matching of two power-orthogonal modes of the parallel coupler. It is shown that either complete power transfer or zero crosstalk can be achieved at two different coupling lengths even when the two wavelengths are strongly coupled and/or close to synchronism. An analytical solution to the coupled-mode equations is obtained for the grating of rectangular shape. A grating-assisted coupler made of two slab waveguides is examined as an example to illustrate the salient features of the scheme

Keywords

diffraction gratings; directional couplers; optical couplers; analytical solution; complete power transfer; coupled-mode equations; coupling lengths; design; grating-assisted directional couplers; parallel coupler; phase matching; power exchange; power-orthogonal modes; rectangular shape; slab waveguides; zero crosstalk; Arrayed waveguide gratings; Councils; Crosstalk; Optical arrays; Optical coupling; Optical fiber couplers; Optical frequency conversion; Optical waveguides; Power markets; Slabs;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.81974

Filename

81974