High efficiency silicon nitride surface grating couplers


High efficiency surface grating couplers for silicon nitride waveguides have been designed, fabricated, and characterized. Coupling efficiencies exceeding 60 % are reported at a wavelength of 1.31 μm, as well as angular and wavelength -3 dB tolerances of 4° and 50 nm, respectively. When the wavelength is increased from 1310 nm to 1450 nm the coupling efficiency progressively decreases but remains above 20 % at 1450 nm. The influence of the duty ratio of the grating has also been investigated: maximum coupling efficiency was obtained at 50 % duty ratio.

Publication DOI: https://doi.org/10.1364/OE.16.000328
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: ©2008 Optical Society of America. This is an open access article according to the OSA Publishing guidelines https://www.osapublishing.org/submit/review/open-access-policy-statement.cfm
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Publication ISSN: 1094-4087
Last Modified: 15 Jul 2024 07:48
Date Deposited: 18 Feb 2019 15:09
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.osa ... uri=oe-16-1-328 (Publisher URL)
PURE Output Type: Article
Published Date: 2008-01-07
Authors: Maire, Guillaume
Vivien, Laurent
Sattler, Guillaume
Kaźmierczak, Andrzej
Sanchez, Benito
Gylfason, Kristinn B.
Griol, Amadeu
Marris-Morini, Delphine
Cassan, Eric
Giannone, Domenico
Sohlström, Hans
Hill, Daniel (ORCID Profile 0000-0003-3510-7783)



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