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Proceedings Paper

Novel U-groove channel for self-alignment of optical fibers with optical quality end-polished silicon rib waveguides using wet chemical micromachining techniques
Author(s): Nam Quoc Ngo; Michel A. Rosa; Denis R. Sweatman; Sima Dimitrijev; H. Barry Harrison; Andrew Titmarsh
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Paper Abstract

This paper presents a new cost-effective fiber-to-waveguide coupling method for self-aligning optical fibers on silicon platforms, and for achieving optical quality end-polished silicon-on-insulator (SOI) single-mode rib waveguide devices using wet chemical micromachining techniques. Through accurate alignment to the <011> plane(s) of the (100) device layer of a SOI wafer, rib waveguide devices with self-alignment features are fabricated with the ends of each waveguide wet etched and concurrently polished providing an optical quality facet or fiber-to waveguide interface. Eliminating the need to saw cut and then mechanically polish the waveguide device ends, the overall fabrication process is simplified and provides a fiber alignment capability at the ends of the waveguide devices with an alignment accuracy limited by fiber size tolerance. Experimental measurements were carried out to verify the optical quality of the waveguide facets formed using this new technique, which proved excess facet losses of practically unmeasurable quantities. Both simulation and experimental results were obtained to verify the single-mode nature of the rib waveguides.

Paper Details

Date Published: 12 November 1999
PDF: 10 pages
Proc. SPIE 3896, Design, Fabrication, and Characterization of Photonic Devices, (12 November 1999); doi: 10.1117/12.370370
Show Author Affiliations
Nam Quoc Ngo, Griffith Univ. (Singapore)
Michel A. Rosa, Xerox Palo Alto Research Ctr. (Australia)
Denis R. Sweatman, Griffith Univ. (Australia)
Sima Dimitrijev, Griffith Univ. (Australia)
H. Barry Harrison, Griffith Univ. (Australia)
Andrew Titmarsh, Griffith Univ. (Australia)

Published in SPIE Proceedings Vol. 3896:
Design, Fabrication, and Characterization of Photonic Devices
Marek Osinski; Soo-Jin Chua; Shigefusa F. Chichibu, Editor(s)

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