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

Research output: ThesisDoctoral Thesis

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  • THESIS - DOCTOR OF PHILOSOPHY - SUSMITHAN Sunil - 2017

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Authors

  • Sunil Susmithan

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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
Award date2 Feb 2017
StateUnpublished - 2017

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