Optimized Silicon AWG With Flattened Spectral Response Using an MMI Aperture

Author

Pathak, Shibnath ; Vanslembrouck, Michael ; Dumon, Pieter ; Van Thourhout, Dries ; Bogaerts, Wim

Author_Institution

Dept. of Inf. Technol., Ghent Univ. - IMEC, Ghent, Belgium

Volume

31

Issue

1

fYear

2013

fDate

Jan.1, 2013

Firstpage

87

Lastpage

93

Abstract

We demonstrate compact 12-channel 400 GHz arrayed waveguide grating wavelength demultiplexers (AWG) in silicon with a flattened spectral response. Insertion loss, crosstalk and non-uniformity are -3.29 dB, 17.0 dB and 1.55 dB, respectively. The flattened spectral response is obtained by using an optimized mode shaper consisting of a multi-mode interference coupler as the input aperture of the AWG. The ratio of the 1 dB bandwidth to the 10 dB bandwidth is improved by 50%, from 0.33 to 0.49 compared to a conventional AWG. The device size is only 560×350 μm² .

Keywords

arrayed waveguide gratings; elemental semiconductors; light interference; optical couplers; optical crosstalk; silicon; MMI aperture; Si; compact 12-channel arrayed waveguide grating wavelength demultiplexers; crosstalk; flattened spectral response; frequency 400 GHz; insertion loss; multimode interference coupler; nonuniformity; optimized mode shaper; optimized silicon AWG; Apertures; Arrayed waveguide gratings; Arrays; Couplers; Crosstalk; Passband; AWG; MMI; phasar (phased array); silicon-on-insulator (SOI);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2012.2231399

Filename

6373682