Multilayer single-mode polymeric waveguides by imprint patterning for optical interconnects

Tia Korhonen, Noora Salminen, Annukka Kokkonen, Noriyuki Masuda, Mikko Karppinen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    6 Citations (Scopus)

    Abstract

    Low-loss single-mode waveguides are fabricated for optical interconnection applications. Such waveguides operating at telecom wavelength window are attractive for communicating between micro-photonic integrated circuit chips, such as silicon photonics, on the carrier/package, and also for enhanced coupling of photonic devices to fibers for longer reach interconnects. Manufacturing of the waveguides is based on direct pattering of optical polymeric materials by UV nanoimprinting. The advantages of the technology include the applicability to stack multiple layers of waveguides, fabrication on various substrate materials, and simultaneous fabrication of optical coupling structures. The developed process enables high wafer-level yield with precision overlay alignment. The multilayer waveguides were implemented using the so-called inverted rib waveguide process, that is, the shape of the waveguide cores are imprinted on the undercladding layer as grooves and then the core material is deposited on the cladding layer filling the grooves and also forming a thin slab layer. The subsequent deposition of the upper cladding layer finalizes the first waveguide layer and also starts the manufacturing of the next waveguide layer. The achieved wafer-scale layer-to-layer alignment tolerances were 1.2 µm and
    Original languageEnglish
    Title of host publicationProceedings of SPIE
    Subtitle of host publicationVolume 8991, Optical Interconnects XIV, 2014
    PublisherInternational Society for Optics and Photonics SPIE
    Number of pages8
    Volume8991
    ISBN (Print)978-0-8194-9904-2
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA4 Article in a conference publication
    EventSPIE Optical Interconnects XIV - San Francisco, CA, United States
    Duration: 3 Feb 20145 Feb 2014

    Publication series

    SeriesProceedings of SPIE
    Volume8991
    ISSN0277-786X

    Conference

    ConferenceSPIE Optical Interconnects XIV
    CountryUnited States
    CitySan Francisco, CA
    Period3/02/145/02/14

    Keywords

    • integrated optics
    • optical interconnect
    • optical polymer
    • single-mode waveguide
    • UV nano-imprinting

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