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Proceedings Paper

Study on low-loss and small-size S-shaped bends in thermo-optic switch matrix
Author(s): Bingna Zhang; Daqing Zhu; Wei Lei; Sihua Zeng
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Paper Abstract

First, in order to get the low-loss and small-size 2-arc S-shaped bend, the lateral offset between waveguides with different curvature was optimized to reduce the mode mismatch. To get the smoother S-shaped bend, which also has the overall bending loss as small as possible, another S-shaped bend based on functional approximation theory of B-spline was put forward. By this means, the transition loss at the junctions can be completely eliminated and also make the pure bending loss as small as possible. A comparison among sine-generated, cosine-generated, 2-arc and numerical calculated S-shaped bends was also been conducted. Using Beam Propagation Method (BPM) and analytical method, the result was verified and good agreement was got.

Paper Details

Date Published: 30 April 2004
PDF: 6 pages
Proc. SPIE 5279, Optical Fibers and Passive Components, (30 April 2004); doi: 10.1117/12.521800
Show Author Affiliations
Bingna Zhang, Huazhong Univ. of Science and Technology (China)
Daqing Zhu, Huazhong Univ. of Science and Technology (China)
Wei Lei, Huazhong Univ. of Science and Technology (China)
Sihua Zeng, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 5279:
Optical Fibers and Passive Components
Steven Shen; Shuisheng Jian; Katsunari Okamoto; Kenneth L. Walker, Editor(s)

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