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Proceedings Paper

Micron-size bending radii in silica-based waveguides
Author(s): Milos Popovic; Kazumi Wada; Shoji Akiyama; Hermann A. Haus; Jurgen Michel
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Paper Abstract

Sharp bends in low index contrast waveguides using tapered air trenches are proposed. To minimize cladding-trench junction loss, cladding tapers are designed to provide adiabatic mode shaping between low and high index contrast regions. Drastic reduction in effective bend radius is predicted. We present 2D FDTD/EIM simulations of bends in representative silica index contrasts. Substrate loss in air trenches of finite depth is investigated, and the required trench depth, given an acceptable substrate loss, is calculated. Fabrication steps are described.

Paper Details

Date Published: 18 June 2002
PDF: 10 pages
Proc. SPIE 4640, Integrated Optics: Devices, Materials, and Technologies VI, (18 June 2002); doi: 10.1117/12.433272
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Published in SPIE Proceedings Vol. 4640:
Integrated Optics: Devices, Materials, and Technologies VI
Yakov S. Sidorin; Ari Tervonen, Editor(s)

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