High efficiency silicon nitride surface grating couplers
2008 (English)In: Optics Express, ISSN 1094-4087, Vol. 16, no 1, 328-333 p.Article in journal (Refereed) Published
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 mu m, 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.
Place, publisher, year, edition, pages
2008. Vol. 16, no 1, 328-333 p.
Other Engineering and Technologies not elsewhere specified
IdentifiersURN: urn:nbn:se:kth:diva-12212DOI: 10.1364/OE.16.000328ISI: 000252234800039PubMedID: 18521164ScopusID: 2-s2.0-38049178733OAI: oai:DiVA.org:kth-12212DiVA: diva2:305950