VTT's micron-scale silicon rib+strip waveguide platform

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

    3 Citations (Scopus)

    Abstract

    Silicon rib waveguides enable single-mode (SM) operation even with the combination of multi-micron core dimensions and high refractive index contrast. In such large waveguides the optical mode field is almost completely confined inside the Si core, which leads to small propagation losses and small polarization dependency. The unique SM condition of the rib waveguide also enables the use of an ultra-wide wavelength range, for example from 1.2 to <1.7 μm, without sacrificing either SM operation or low propagation loss. This makes micron-scale Si waveguides particularly well-suited for spectroscopy and extensive wavelength division multiplexing. However, rib waveguides require large bending radii, which lead to large circuit sizes. There are two solutions for this. So-called Euler bends in Si strip waveguides enable low-loss bends down to 1 μm bending radius with less than 0.1 dB/90° loss for both polarizations. Another alternative is a total-internal reflection mirror that can have loss as low as 0.1 dB for both polarizations in either strip or rib waveguides. The excitation of higher order modes in large strip waveguides is avoided by using adiabatic rib-strip converters and low-loss components. With rib and strip waveguides it is possible to reach a unique combination of low loss, extremely small footprint, small polarization dependency, ultra-wide bandwidth and tolerance to high optical powers.

    Original languageEnglish
    Title of host publicationSilicon Photonics and Photonic Integrated Circuits V
    PublisherInternational Society for Optics and Photonics SPIE
    ISBN (Electronic)9781510601369
    DOIs
    Publication statusPublished - 1 Jan 2016
    MoE publication typeA4 Article in a conference publication
    EventSilicon Photonics and Photonic Integrated Circuits V - Brussels, Belgium
    Duration: 3 Apr 20167 Apr 2016

    Publication series

    SeriesProceedings of SPIE
    Volume9891
    ISSN0277-786X

    Conference

    ConferenceSilicon Photonics and Photonic Integrated Circuits V
    CountryBelgium
    CityBrussels
    Period3/04/167/04/16

    Fingerprint

    Silicon
    Strip
    Waveguide
    strip
    Waveguides
    platforms
    waveguides
    silicon
    Polarization
    Single Mode
    polarization
    Radius
    Wavelength
    Propagation
    Total Internal Reflection
    radii
    propagation
    footprints
    wavelength division multiplexing
    Multiplexing

    Keywords

    • Multi-project wafer (MPW) runs
    • Rib waveguides
    • Silicon photonics
    • Silicon-on-insulator

    Cite this

    Aalto, T., Harjanne, M., & Cherchi, M. (2016). VTT's micron-scale silicon rib+strip waveguide platform. In Silicon Photonics and Photonic Integrated Circuits V [98911G] International Society for Optics and Photonics SPIE. Proceedings of SPIE, Vol.. 9891 https://doi.org/10.1117/12.2234588
    Aalto, Timo ; Harjanne, Mikko ; Cherchi, Matteo. / VTT's micron-scale silicon rib+strip waveguide platform. Silicon Photonics and Photonic Integrated Circuits V. International Society for Optics and Photonics SPIE, 2016. (Proceedings of SPIE, Vol. 9891).
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    abstract = "Silicon rib waveguides enable single-mode (SM) operation even with the combination of multi-micron core dimensions and high refractive index contrast. In such large waveguides the optical mode field is almost completely confined inside the Si core, which leads to small propagation losses and small polarization dependency. The unique SM condition of the rib waveguide also enables the use of an ultra-wide wavelength range, for example from 1.2 to <1.7 μm, without sacrificing either SM operation or low propagation loss. This makes micron-scale Si waveguides particularly well-suited for spectroscopy and extensive wavelength division multiplexing. However, rib waveguides require large bending radii, which lead to large circuit sizes. There are two solutions for this. So-called Euler bends in Si strip waveguides enable low-loss bends down to 1 μm bending radius with less than 0.1 dB/90° loss for both polarizations. Another alternative is a total-internal reflection mirror that can have loss as low as 0.1 dB for both polarizations in either strip or rib waveguides. The excitation of higher order modes in large strip waveguides is avoided by using adiabatic rib-strip converters and low-loss components. With rib and strip waveguides it is possible to reach a unique combination of low loss, extremely small footprint, small polarization dependency, ultra-wide bandwidth and tolerance to high optical powers.",
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    Aalto, T, Harjanne, M & Cherchi, M 2016, VTT's micron-scale silicon rib+strip waveguide platform. in Silicon Photonics and Photonic Integrated Circuits V., 98911G, International Society for Optics and Photonics SPIE, Proceedings of SPIE, vol. 9891, Silicon Photonics and Photonic Integrated Circuits V, Brussels, Belgium, 3/04/16. https://doi.org/10.1117/12.2234588

    VTT's micron-scale silicon rib+strip waveguide platform. / Aalto, Timo; Harjanne, Mikko; Cherchi, Matteo.

    Silicon Photonics and Photonic Integrated Circuits V. International Society for Optics and Photonics SPIE, 2016. 98911G (Proceedings of SPIE, Vol. 9891).

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

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    N2 - Silicon rib waveguides enable single-mode (SM) operation even with the combination of multi-micron core dimensions and high refractive index contrast. In such large waveguides the optical mode field is almost completely confined inside the Si core, which leads to small propagation losses and small polarization dependency. The unique SM condition of the rib waveguide also enables the use of an ultra-wide wavelength range, for example from 1.2 to <1.7 μm, without sacrificing either SM operation or low propagation loss. This makes micron-scale Si waveguides particularly well-suited for spectroscopy and extensive wavelength division multiplexing. However, rib waveguides require large bending radii, which lead to large circuit sizes. There are two solutions for this. So-called Euler bends in Si strip waveguides enable low-loss bends down to 1 μm bending radius with less than 0.1 dB/90° loss for both polarizations. Another alternative is a total-internal reflection mirror that can have loss as low as 0.1 dB for both polarizations in either strip or rib waveguides. The excitation of higher order modes in large strip waveguides is avoided by using adiabatic rib-strip converters and low-loss components. With rib and strip waveguides it is possible to reach a unique combination of low loss, extremely small footprint, small polarization dependency, ultra-wide bandwidth and tolerance to high optical powers.

    AB - Silicon rib waveguides enable single-mode (SM) operation even with the combination of multi-micron core dimensions and high refractive index contrast. In such large waveguides the optical mode field is almost completely confined inside the Si core, which leads to small propagation losses and small polarization dependency. The unique SM condition of the rib waveguide also enables the use of an ultra-wide wavelength range, for example from 1.2 to <1.7 μm, without sacrificing either SM operation or low propagation loss. This makes micron-scale Si waveguides particularly well-suited for spectroscopy and extensive wavelength division multiplexing. However, rib waveguides require large bending radii, which lead to large circuit sizes. There are two solutions for this. So-called Euler bends in Si strip waveguides enable low-loss bends down to 1 μm bending radius with less than 0.1 dB/90° loss for both polarizations. Another alternative is a total-internal reflection mirror that can have loss as low as 0.1 dB for both polarizations in either strip or rib waveguides. The excitation of higher order modes in large strip waveguides is avoided by using adiabatic rib-strip converters and low-loss components. With rib and strip waveguides it is possible to reach a unique combination of low loss, extremely small footprint, small polarization dependency, ultra-wide bandwidth and tolerance to high optical powers.

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    Aalto T, Harjanne M, Cherchi M. VTT's micron-scale silicon rib+strip waveguide platform. In Silicon Photonics and Photonic Integrated Circuits V. International Society for Optics and Photonics SPIE. 2016. 98911G. (Proceedings of SPIE, Vol. 9891). https://doi.org/10.1117/12.2234588