Ogin, Gregory H. (2013) Measurement of thermo-optic properties of thin film dielectric coatings. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:08212012-185113285
We have carried out an experiment to test the theory of the thermo-optic response of a dielectric stack mirror coating and to measure parameters of interest in calculating thermo-optic noise. Specifically, we measured the coefficient of thermal expansion and the change of index of refraction with temperature (dn/dT ) for thin film silica (SiO2) and tantala (Ta2O5) in mirror coatings. These measurements were achieved by driving thermal fluctuations in such mirrors in one arm of a small Michelson interferometer. We report on the results of that experiment along with its potential implications for future gravitational wave detectors, and suggest next steps for this important line of investigation.
|Item Type:||Thesis (Dissertation (Ph.D.))|
|Subject Keywords:||Thin Film Dielectric Mirror Coating Coefficient of Thermal Expansion Thermo-Optic Tantala Silica|
|Degree Grantor:||California Institute of Technology|
|Division:||Physics, Mathematics and Astronomy|
|Thesis Availability:||Public (worldwide access)|
|Defense Date:||10 August 2012|
|Default Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Gregory Ogin|
|Deposited On:||19 Nov 2012 20:08|
|Last Modified:||26 Dec 2012 04:44|
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