Taper-integrated multimode-interference based crossings for silicon wire waveguides

Chia-Hsiang Chiu; Chyong-Hua Chen

doi:10.1117/12.841544

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16 February 2010 Taper-integrated multimode-interference based crossings for silicon wire waveguides

Chia-Hsiang Chiu, Chyong-Hua Chen

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Proceedings Volume 7606, Silicon Photonics V; 76061C (2010) https://doi.org/10.1117/12.841544
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

Novel multimode-interference (MMI)-based crossings integrated with miniaturized tapers are numerically presented for Silicon wire waveguides. These miniature tapers function as field expanders to reduce transition loss between the input/output waveguide and the MMI region and the crosstalk in the crossing section. As a consequence, the lengths of MMI sections reduce to less than twice of the beat length. Using finite different time domain method, we demonstrate that the MMI-based waveguide crossing embedded in the quadratic tapers has the size of 5800x5800 nm², the insertion loss of 0.15 dB and the crosstalk of -42 dB at the wavelength of 1550 nm and broad transmission spectrum ranging from 1500 nm to 1600 nm.

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Chia-Hsiang Chiu and Chyong-Hua Chen "Taper-integrated multimode-interference based crossings for silicon wire waveguides", Proc. SPIE 7606, Silicon Photonics V, 76061C (16 February 2010); https://doi.org/10.1117/12.841544

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