A Compact Silicon-on-insulator Polarization Splitter
Date
2005
Authors
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Source Title
IEEE Photonics Technology Letters
Print ISSN
1041-1135
Electronic ISSN
Publisher
IEEE
Volume
17
Issue
1
Pages
100 - 102
Language
English
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Abstract
A compact directional coupler-based polarization splitter is designed and realized using silicon-on-insulator (SOI) waveguides. Even though silicon does not have any material birefringence, the high index contrast obtained in the SOI platform and reduced waveguide dimensions makes it possible to induce significant birefringence. Polarization splitting is achieved by making use of this geometry-induced birefringence. In this work, we demonstrate polarization splitting in devices as short as 120 gm. Even smaller devices can be made using submicron-thick Si waveguides.