Thermal tuning the optical cavity for 3 mode interaction studies using a CO2 laser

    Research output: Chapter in Book/Conference paperConference paper

    5 Citations (Scopus)

    Abstract

    Three mode interactions could induce parametric instability in advanced gravitational wave detectors with high optical power circulating in the cavities. One of the conditions for parametric instability to occur is when the cavity frequency difference between fundamental mode and the high order mode matches the test mass acoustic mode frequency. The optical mode spacing is a function of cavity g-factor (radius of curvature). At the Gingin High Optical Power Facility, we have an 80 meter optical cavity particularly designed for studying high optical power effects in advanced gravitational wave detectors such as parametric instabilities. Here we present the recent results of thermal tuning the cavity g-factor by heating the test mass surface with a CO 2 laser to investigate the 3-mode interactions. Observation of test mass thermal noise peaks above 160 kHz enhanced by 3 mode interaction is presented.

    Original languageEnglish
    Title of host publicationJournal of Physics
    Subtitle of host publicationConference Series
    EditorsMark Hannam, Patrick Sutton, Stefan Hild, Chris Van Den Broeck
    Place of PublicationBristol, UK
    PublisherIOP Publishing
    Number of pages6
    Volume363
    ISBN (Print)1742-6588
    DOIs
    Publication statusPublished - 2012
    Event9th Edoardo Amaldi conference on gravitational waves (Amaldi 9) and the 2011 Numerical Relativity – Data Analysis meeting - Cardiff, United Kingdom
    Duration: 10 Jul 201115 Jul 2011
    Conference number: NRDA2011

    Conference

    Conference9th Edoardo Amaldi conference on gravitational waves (Amaldi 9) and the 2011 Numerical Relativity – Data Analysis meeting
    CountryUnited Kingdom
    CityCardiff
    Period10/07/1115/07/11

    Fingerprint Dive into the research topics of 'Thermal tuning the optical cavity for 3 mode interaction studies using a CO2 laser'. Together they form a unique fingerprint.

    Cite this