Thermal tuning of a Fabry-Perot cavity for the control of Parametric Instability using a CO2 laser

Sunil Susmithan

    Research output: ThesisDoctoral Thesis

    211 Downloads (Pure)

    Abstract

    The thesis reports an experimental investigation of three-mode interactions and parametric instability in advanced laser Interferometer gravitational wave detectors at high optical power. In an 80-meter Fabry-Perot optical cavity at Gingin, the amplification of test mass acoustic modes via three-mode interactions was demonstrated. Thermal tuning for control and suppression of parametric instability, where the radius of curvature of one cavity test mass mirror was tuned using a stabilized C02 laser, was successfully demonstrated. It was shown that thermal tuning could be used as one of the methods to prevent instability for uninterrupted functioning of gravitational wave detectors.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • The University of Western Australia
    Award date2 Feb 2017
    Publication statusUnpublished - 2017

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    tuning
    gravitational waves
    cavities
    lasers
    theses
    detectors
    interferometers
    curvature
    retarding
    interactions
    mirrors
    radii
    acoustics

    Cite this

    @phdthesis{d00ad818267c4c8b9248a12877cbcd1b,
    title = "Thermal tuning of a Fabry-Perot cavity for the control of Parametric Instability using a CO2 laser",
    abstract = "The thesis reports an experimental investigation of three-mode interactions and parametric instability in advanced laser Interferometer gravitational wave detectors at high optical power. In an 80-meter Fabry-Perot optical cavity at Gingin, the amplification of test mass acoustic modes via three-mode interactions was demonstrated. Thermal tuning for control and suppression of parametric instability, where the radius of curvature of one cavity test mass mirror was tuned using a stabilized C02 laser, was successfully demonstrated. It was shown that thermal tuning could be used as one of the methods to prevent instability for uninterrupted functioning of gravitational wave detectors.",
    keywords = "Gravitational wave detector, Fabry-Perot cavity, Three-mode interactions, Parametric instability, Carbon dioxide (CO2) laser, Thermal tuning, Acoustic modes, Radiation pressure",
    author = "Sunil Susmithan",
    year = "2017",
    language = "English",
    school = "The University of Western Australia",

    }

    Susmithan, S 2017, 'Thermal tuning of a Fabry-Perot cavity for the control of Parametric Instability using a CO2 laser', Doctor of Philosophy, The University of Western Australia.

    Thermal tuning of a Fabry-Perot cavity for the control of Parametric Instability using a CO2 laser. / Susmithan, Sunil.

    2017.

    Research output: ThesisDoctoral Thesis

    TY - THES

    T1 - Thermal tuning of a Fabry-Perot cavity for the control of Parametric Instability using a CO2 laser

    AU - Susmithan, Sunil

    PY - 2017

    Y1 - 2017

    N2 - The thesis reports an experimental investigation of three-mode interactions and parametric instability in advanced laser Interferometer gravitational wave detectors at high optical power. In an 80-meter Fabry-Perot optical cavity at Gingin, the amplification of test mass acoustic modes via three-mode interactions was demonstrated. Thermal tuning for control and suppression of parametric instability, where the radius of curvature of one cavity test mass mirror was tuned using a stabilized C02 laser, was successfully demonstrated. It was shown that thermal tuning could be used as one of the methods to prevent instability for uninterrupted functioning of gravitational wave detectors.

    AB - The thesis reports an experimental investigation of three-mode interactions and parametric instability in advanced laser Interferometer gravitational wave detectors at high optical power. In an 80-meter Fabry-Perot optical cavity at Gingin, the amplification of test mass acoustic modes via three-mode interactions was demonstrated. Thermal tuning for control and suppression of parametric instability, where the radius of curvature of one cavity test mass mirror was tuned using a stabilized C02 laser, was successfully demonstrated. It was shown that thermal tuning could be used as one of the methods to prevent instability for uninterrupted functioning of gravitational wave detectors.

    KW - Gravitational wave detector

    KW - Fabry-Perot cavity

    KW - Three-mode interactions

    KW - Parametric instability

    KW - Carbon dioxide (CO2) laser

    KW - Thermal tuning

    KW - Acoustic modes

    KW - Radiation pressure

    M3 - Doctoral Thesis

    ER -