Design of tight bends in silicon-on-insulator ridge waveguides

    Research output: Contribution to journalArticleScientificpeer-review

    7 Citations (Scopus)

    Abstract

    In this work numerical analysis was used to explore ways for reducing bending losses in silicon-on-insulator ridge waveguides. Bending losses in single-mode ridge waveguides with different sizes were calculated. The results obtained were used in a numerical optimization of an S-bend structure. Also, the loss reduction achieved by placing a groove along the side of a bend was determined. Calculations were made for both TE and TM polarizations at 1550nm wavelength. Smaller waveguides were found to cause much smaller bending losses. The groove structure allows the use of ten times smaller bending radii. With the groove, a ridge waveguide with 1.5µm thickness and 75µm bending radius was found to have only 0.7dB loss in a 90° turn, when both bending and junction losses were taken into account. The numerical path optimization of an S-bend halved the total loss in dB.
    Original languageEnglish
    Pages (from-to)209-212
    JournalPhysica Scripta: Topical Issues
    VolumeT114
    DOIs
    Publication statusPublished - 2004
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Silicon-on-insulator
    Ridge
    Waveguide
    ridges
    insulators
    waveguides
    silicon
    grooves
    Radius
    optimization
    radii
    Numerical Optimization
    Single Mode
    Design
    numerical analysis
    Numerical Analysis
    Polarization
    Wavelength
    Path
    Optimization

    Cite this

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    title = "Design of tight bends in silicon-on-insulator ridge waveguides",
    abstract = "In this work numerical analysis was used to explore ways for reducing bending losses in silicon-on-insulator ridge waveguides. Bending losses in single-mode ridge waveguides with different sizes were calculated. The results obtained were used in a numerical optimization of an S-bend structure. Also, the loss reduction achieved by placing a groove along the side of a bend was determined. Calculations were made for both TE and TM polarizations at 1550nm wavelength. Smaller waveguides were found to cause much smaller bending losses. The groove structure allows the use of ten times smaller bending radii. With the groove, a ridge waveguide with 1.5µm thickness and 75µm bending radius was found to have only 0.7dB loss in a 90° turn, when both bending and junction losses were taken into account. The numerical path optimization of an S-bend halved the total loss in dB.",
    author = "Mikko Harjanne and Timo Aalto",
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    Design of tight bends in silicon-on-insulator ridge waveguides. / Harjanne, Mikko; Aalto, Timo.

    In: Physica Scripta: Topical Issues, Vol. T114, 2004, p. 209-212.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Design of tight bends in silicon-on-insulator ridge waveguides

    AU - Harjanne, Mikko

    AU - Aalto, Timo

    N1 - Project code: T3SU00354

    PY - 2004

    Y1 - 2004

    N2 - In this work numerical analysis was used to explore ways for reducing bending losses in silicon-on-insulator ridge waveguides. Bending losses in single-mode ridge waveguides with different sizes were calculated. The results obtained were used in a numerical optimization of an S-bend structure. Also, the loss reduction achieved by placing a groove along the side of a bend was determined. Calculations were made for both TE and TM polarizations at 1550nm wavelength. Smaller waveguides were found to cause much smaller bending losses. The groove structure allows the use of ten times smaller bending radii. With the groove, a ridge waveguide with 1.5µm thickness and 75µm bending radius was found to have only 0.7dB loss in a 90° turn, when both bending and junction losses were taken into account. The numerical path optimization of an S-bend halved the total loss in dB.

    AB - In this work numerical analysis was used to explore ways for reducing bending losses in silicon-on-insulator ridge waveguides. Bending losses in single-mode ridge waveguides with different sizes were calculated. The results obtained were used in a numerical optimization of an S-bend structure. Also, the loss reduction achieved by placing a groove along the side of a bend was determined. Calculations were made for both TE and TM polarizations at 1550nm wavelength. Smaller waveguides were found to cause much smaller bending losses. The groove structure allows the use of ten times smaller bending radii. With the groove, a ridge waveguide with 1.5µm thickness and 75µm bending radius was found to have only 0.7dB loss in a 90° turn, when both bending and junction losses were taken into account. The numerical path optimization of an S-bend halved the total loss in dB.

    U2 - 10.1088/0031-8949/2004/T114/053

    DO - 10.1088/0031-8949/2004/T114/053

    M3 - Article

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    JO - Physica Scripta

    JF - Physica Scripta

    SN - 0031-8949

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