Apodized Focusing Fully Etched Subwavelength Grating Couplers

Author

Yun Wang ; Han Yun ; Zeqin Lu ; Bojko, Richard ; Wei Shi ; Xu Wang ; Flueckiger, Jonas ; Fan Zhang ; Caverley, Michael ; Jaeger, Nicolas A. F. ; Chrostowski, Lukas

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada

Volume

7

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

10

Abstract

We experimentally demonstrate apodized focusing subwavelength grating couplers for both the fundamental transverse electric (TE₀₀) mode and the fundamental transverse magnetic (TM₀₀) mode. A measured insertion loss of 3.2 dB with a 1-dB bandwidth of 36 nm has been obtained for the TE₀₀ mode, and a measured insertion loss of 3.3 dB with a 1-dB bandwidth of 37 nm has been obtained for the TM₀₀ mode. Back reflections of -24 dB and -21 dB have been obtained for the TE₀₀ and TM₀₀ modes, respectively.

Keywords

diffraction gratings; integrated optics; optical couplers; optical design techniques; optical losses; silicon-on-insulator; SOI; Si; TE₀₀ mode; TM₀₀ mode; apodized focusing fully etched subwavelength grating couplers; back reflections; fundamental transverse magnetic mode; insertion loss; silicon-on-insulator; transverse electric mode; Couplers; Fabrication; Focusing; Gratings; Indexes; Insertion loss; Optical waveguides; Gratings; Subwavelength structures; gratings;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2015.2426879

Filename

7097646