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Related Experiment Videos

Wavelength selective switch array employing silica-based waveguide frontend with integrated polarization diversity

Yohei Sakamaki, Kota Shikama, Yuichiro Ikuma

    Optics Express
    |October 19, 2017
    PubMed
    Summary

    We developed a novel waveguide frontend for wavelength selective switches (WSS) that simplifies optical module design. This integrated polarization diversity optics eliminates complex free-space configurations, maintaining high optical performance.

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    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics
    • Liquid Crystal on Silicon (LCoS) Technology

    Background:

    • Wavelength Selective Switches (WSS) are crucial for optical network flexibility.
    • Traditional WSS designs often involve complex free-space optics, leading to alignment challenges.
    • Liquid Crystal on Silicon (LCoS) technology offers advanced switching capabilities but requires careful optical integration.

    Purpose of the Study:

    • To propose and validate a simplified waveguide frontend for LCoS-based WSS arrays.
    • To integrate polarization diversity optics directly into the waveguide frontend.
    • To reduce the complexity of free-space optics and improve the alignment process in optical modules.

    Main Methods:

    • Utilizing silica-based planar lightwave circuit (PLC) technology for fabrication.

    Related Experiment Videos

  • Integrating a waveguide-type polarization beam splitter (PBS) and a polarization rotating half-wave plate into a beam launcher.
  • Experimental validation of the proposed waveguide frontend in a 1x20 WSS.

    • Main Results:

    • Successful integration of polarization diversity optics within the waveguide frontend.
    • Demonstrated feasibility in a two-in-one 1x20 WSS configuration.
    • Experimental results confirmed polarization diversity function without optical performance degradation.

    Conclusions:

    • The proposed waveguide frontend effectively simplifies optical module design for LCoS WSS.
    • Integrated polarization diversity optics in PLC technology is a viable solution for advanced optical switching.
    • This approach enhances manufacturability and reliability of WSS devices.