Polarization management for silicon photonic integrated circuits

Authors

  • Daoxin Dai,

    1. Centre for Optical and Electromagnetic Research, State Key Laboratory for Modern Optical Instrumentation, Zhejiang University (ZJU), Zijingang, Hangzhou, China
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  • Liu Liu,

    1. Centre for Optical and Electromagnetic Research, ZJU-SCNU Joint Research Center of Photonics, South China Academy of Advanced Opto-electronics, South China Normal University (SCNU), Guangzhou, China
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  • Shiming Gao,

    1. Centre for Optical and Electromagnetic Research, State Key Laboratory for Modern Optical Instrumentation, Zhejiang University (ZJU), Zijingang, Hangzhou, China
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  • Dan-Xia Xu,

    1. Institute for Microstructural Sciences, National Research Council Canada, Ottawa, Ontario, Canada
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  • Sailing He

    Corresponding author
    1. Centre for Optical and Electromagnetic Research, ZJU-SCNU Joint Research Center of Photonics, South China Academy of Advanced Opto-electronics, South China Normal University (SCNU), Guangzhou, China
    • Centre for Optical and Electromagnetic Research, State Key Laboratory for Modern Optical Instrumentation, Zhejiang University (ZJU), Zijingang, Hangzhou, China
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Corresponding author: e-mail: sailing@zju.edu.cn

Abstract

Polarization management is very important for photonic integrated circuits (PICs) and their applications. Due to geometrical anisotropy and fabrication inaccuracies, the characteristics of the guided transverse-electrical (TE) and transverse-magnetic (TM) modes are generally different. Polarization-dependent dispersion and polarization-dependent loss are such manifestations in PICs. These issues become more severe in high index contrast structures such as nanophotonic waveguides made of silicon-on-insulator (SOI), which has been regarded as a good platform for optical interconnects because of the compatibility with CMOS processing. Recently, polarization division multiplexing (PDM) with coherent detection using silicon photonics has also attracted much attention. This trend further highlights the importance of polarization management in silicon PICs. The authors review their work on polarization management for silicon PICs using the polarization independence and polarization diversity methods. Polarization issues and solutions in PICs made of SOI nanowires and ridge waveguides are discussed.

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