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Optical Engineering

Elimination of cross-talk in silicon-on-insulator waveguide crossings with optimized angle
Author(s): Yiyuan Xie; Jiang Xu; Jianguo Zhang
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Paper Abstract

We present a low crosstalk, low losses crossings for silicon-on-insulator waveguides by choosing the optimum crossing angle. The waveguides are broadened using a 3 μm parabolic taper in each arm. It is obtained that by using the crossing angles of 60 deg instead of the conventional 90 deg crossing angle, crosstalk losses are improved by more than 3.7 dB without degrading transmission losses. The transmission behavior of the crossing waveguides are illustrated by numerical simulations through the finite difference time domain method. The proposed crossing structure has a high compactness, a broad bandwidth with almost flat transmission losses, and constant crosstalk losses.

Paper Details

Date Published: 1 June 2011
PDF: 5 pages
Opt. Eng. 50(6) 064601 doi: 10.1117/1.3593153
Published in: Optical Engineering Volume 50, Issue 6
Show Author Affiliations
Yiyuan Xie, Southwest Univ. (China)
Jiang Xu, Hong Kong Univ. of Science and Technology (Hong Kong, China)
Jianguo Zhang, London South Bank Univ. (United Kingdom)

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