Focusing Polarization Diversity Grating Couplers in Silicon-on-Insulator

Author

Laere, Frederik Van ; Bogaerts, Wim ; Dumon, Pieter ; Roelkens, Günther ; Thourhout, Dries Van ; Baets, Roel

Author_Institution

Dept. of Inf. Technol. (INTEC), Ghent Univ., Ghent

Volume

27

Issue

5

fYear

2009

fDate

3/1/2009 12:00:00 AM

Firstpage

612

Lastpage

618

Abstract

We report on compact focusing polarization diversity grating couplers in silicon-on-insulator, which can be used to overcome the polarization dependence of nanophotonic integrated circuits. The minimum fiber-to-fiber polarization dependent loss is 0.4 dB and the focusing grating couplers are as performant as standard 2-D-grating couplers without focusing. In addition, the focusing property of the gratings results in an 8-fold length reduction of the coupling structure as compared to standard nonfocusing 2-D-grating versions.

Keywords

diffraction gratings; integrated optics; nanophotonics; optical fibre couplers; optical fibre losses; optical fibre polarisation; optical focusing; silicon-on-insulator; 2D-grating couplers; fiber-to-fiber polarization dependent loss; focusing grating couplers; nanophotonic integrated circuits; silicon-on-insulator; CMOS technology; Coupling circuits; Fiber gratings; Integrated optics; Optical fiber couplers; Optical fiber losses; Optical fiber polarization; Optical polarization; Optical waveguides; Silicon on insulator technology; Focusing grating; integrated optics; polarization diversity; silicon-on-insulator;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2008.2004946

Filename

4814781