Parametric instability in gravitational wave detectors

    Research output: ThesisDoctoral Thesis

    643 Downloads (Pure)


    This thesis describes experimental studies of three mode parametric instability, an optomechanical instability that affects advanced gravitational wave detectors. Experiments described include the first observations of free running parametric instability in an 80m high power optical cavity, a proposed novel control technique using thermal modulation, the first experimental demonstration of electrostatic feedback control of parametric instability and the first demonstration of three mode interaction monitoring to measure changes in temperature distribution in Advanced LIGO testmasses. The successful work controlling parametric instability has been demonstrated with the operation of Advanced LIGO in 2015-2017 with minimal disruption from parametric instabilities.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • The University of Western Australia
    Thesis sponsors
    Award date18 Sep 2017
    Publication statusUnpublished - 2017


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