Design of grating-assisted waveguide couplers with weighted coupling

Author

Winick, Kim A.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

9

Issue

11

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

1481

Lastpage

1492

Abstract

The design of grating-assisted, channel waveguide codirectional couplers is demonstrated using the Gel´fand-Levitan-Marchenko inverse scattering method. Weighted coupling coefficients are computed from rational expression for the desired wavelength response. Approximate formulas that relate the waveguide and grating geometries to the computed coupling coefficients are derived. The technique is illustrated by designing a directional coupler with a third-order Butterworth filter characteristic and a 130 Å full-width-half-maximum bandwidth

Keywords

diffraction gratings; directional couplers; optical couplers; optical waveguide theory; Gel´fand-Levitan-Marchenko inverse scattering method; approximate formulas; computed coupling coefficients; design; directional coupler; full-width-half-maximum bandwidth; grating assisted channel waveguide codirectional couplers; grating geometries; rational expression; third-order Butterworth filter characteristic; wavelength response; weighted coupling coefficients; Bandwidth; Communication networks; Computational geometry; Directional couplers; Filters; Frequency conversion; Gratings; Inverse problems; Narrowband; WDM networks;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.97636

Filename

97636