Study on low-loss and small-size S-shaped bends in thermo-optic switch matrix

Bingna Zhang; Daqing Zhu; Wei Lei; Sihua Zeng

doi:10.1117/12.521800

30 April 2004 Study on low-loss and small-size S-shaped bends in thermo-optic switch matrix

Bingna Zhang, Daqing Zhu, Wei Lei, Sihua Zeng

Proceedings Volume 5279, Optical Fibers and Passive Components; (2004) https://doi.org/10.1117/12.521800
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China

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.

Citation Download Citation

Bingna Zhang, Daqing Zhu, Wei Lei, and Sihua Zeng "Study on low-loss and small-size S-shaped bends in thermo-optic switch matrix", Proc. SPIE 5279, Optical Fibers and Passive Components, (30 April 2004); https://doi.org/10.1117/12.521800

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