Compact and Highly Efficient Grating Couplers Between Optical Fiber and Nanophotonic Waveguides

Author

Van Laere, Frederik ; Roelkens, Günther ; Ayre, Melanie ; Schrauwen, Jonathan ; Taillaert, Dirk ; Van Thourhout, Dries ; Krauss, Thomas F. ; Baets, Roel

Author_Institution

Interuniv. Microelectron. Center, Ghent Univ.

Volume

25

Issue

1

fYear

2007

Firstpage

151

Lastpage

156

Abstract

We present high-efficiency grating couplers for coupling between a single-mode fiber and nanophotonic waveguides, fabricated both in silicon-on-insulator (SOI) and InP membranes using BenzoCycloButene wafer bonding. The coupling efficiency is substantially increased by adding a gold bottom mirror to the structures. The measured coupling efficiency to fiber is 69% for SOI grating couplers and 56% for bonded InP membrane grating couplers

Keywords

diffraction gratings; indium compounds; integrated optics; membranes; micro-optics; mirrors; nanotechnology; optical fibre couplers; optical waveguides; silicon-on-insulator; wafer bonding; Au; InP; InP membrane; Si-SiO₂; benzocyclobutene wafer bonding; gold mirror; grating couplers; nanophotonic waveguides; optical fiber; silicon-on-insulator membrane; single-mode fiber coupling; wafer bonding; Biomembranes; Fiber gratings; Gold; Indium phosphide; Mirrors; Optical fiber couplers; Optical fibers; Optical waveguides; Silicon on insulator technology; Wafer bonding; BenzoCycloButene (BCB) wafer bonding; gold mirror; grating couplers; integrated optics;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2006.888164

Filename

4137620