Journal
OPTICS EXPRESS
Volume 21, Issue 15, Pages 17814-17823Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.017814
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Funding
- European Community [ICT-FET 270773]
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We demonstrate theoretically and experimentally how highly multimodal high index contrast waveguides with micron-scale cores can be bent, on an ultra-broad band of operation, with bending radii below 10 mu m and losses for the fundamental mode below 0.02 dB/90. The bends have been designed based on the Euler spiral and fabricated on 4 mu m thick SOI. The proposed approach enabled also the realization of 180 bends with 1.27 mu m effective radii and 0.09 dB loss, which are the smallest low-loss bends ever reported for an optical waveguide. These results pave the way for unprecedented integration density in most semiconductor platforms. (C) 2013 Optical Society of America
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