Title :
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
fDate :
3/1/2009 12:00:00 AM
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;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.2004946
