Planar waveguide to vertical mode couplers covering the visible to IR spectral range

Cassells, Ross and Smith, Jack A. and Hu, Changyu and Bommer, Sean P. and Guilhabert, Benoit and Dawson, Martin D. and Strain, Michael J. (2024) Planar waveguide to vertical mode couplers covering the visible to IR spectral range. Optics Express, 32 (22). 38128. ISSN 1094-4087 (https://doi.org/10.1364/OE.539044)

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Abstract

Planar 45° turning mirrors with metal coating, embedded in SU8 polymer waveguides, enable waveguide to vertical mode coupling across a broad range of wavelengths from the visible to IR. The fabrication of these 2.5D structures is achieved using relatively simple grayscale lithography in thin film resists, compatible with standard planar lithography methods. Mirror losses of <1dB are measured from 516 -1630 nm, and direct coupling to single mode fibre is achieved.

ORCID iDs

Cassells, Ross, Smith, Jack A., Hu, Changyu, Bommer, Sean P., Guilhabert, Benoit ORCID logoORCID: https://orcid.org/0000-0002-3986-8566, Dawson, Martin D. ORCID logoORCID: https://orcid.org/0000-0002-6639-2989 and Strain, Michael J. ORCID logoORCID: https://orcid.org/0000-0002-9752-3144;
CORE (COnnecting REpositories)