Multifunctional grating couplers for bidirectional incoupling into planar waveguides

Author

Backlund, Johan ; Bengtsson, Jörgen ; Carlström, Carl-Fredrik ; Larsson, Anders

Author_Institution

Dept. of Microelectron., Chalmers Univ. of Technol., Goteborg, Sweden

Volume

12

Issue

3

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

314

Lastpage

316

Abstract

A novel type of grating coupler for coupling light from free space into a planar waveguide was designed. Compared to a conventional grating coupler which can couple light into one main direction, this new design enables simultaneous coupling into two opposite main directions. This leads to increased flexibility in integrated optics design and may also increase the overall coupling efficiency. We demonstrate experimentally devices for bidirectional incoupling with additional beam splitting and focusing capabilities.

Keywords

diffraction gratings; optical beam splitters; optical couplers; optical design techniques; optical focusing; optical planar waveguides; additional optical beam splitting; bidirectional incoupling; coupling light; free spac; integrated optics design; multifunctional grating couplers; optical focusing capabilities; overall coupling efficiency; planar waveguides; Couplers; Coupling circuits; Gratings; Holographic optical components; Integrated optics; Optical coupling; Optical design; Optical propagation; Optical waveguides; Planar waveguides;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.826925

Filename

826925