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.
|Qualification||Doctor of Philosophy|
|Award date||2 Feb 2017|
|Publication status||Unpublished - 2017|