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Low loss coupling to sub-micron thick rib and nanowire waveguides by vertical tapering

Madden, S.; Jin, Z.; Choi, D.; Debbarma, S.; Bulla, D.; Luther-Davies, B.


Highly nonlinear planar glass waveguides have been shown to be useful for all optical signal processing. However, the typical SMF-28 fiber to waveguide coupling loss of ~5dB/end remains a barrier to practical implementation. Low loss coupling to a fiber using vertical tapering of the waveguide film is analyzed for rib and nanowire waveguides and experimentally demonstrated for ribs showing polarization and wavelength independence over >300nm bandwidth. Tapers with essentially zero excess loss...[Show more]

CollectionsANU Research Publications
Date published: 2013
Type: Journal article
Source: Optics Express
DOI: 10.1364/OE.21.003582


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