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

Sunil Susmithan

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

Sunil Susmithan

Research output: Thesis › Doctoral Thesis

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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 language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Zhao, Chunnong, Supervisor Ju, Li, Supervisor Blair, David, Supervisor
Award date	2 Feb 2017
Publication status	Unpublished - 2017

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THESIS - DOCTOR OF PHILOSOPHY - SUSMITHAN Sunil - 2017
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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",

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TY - BOOK

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 -

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

Abstract

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