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University of Florida

1. Eichholz, Johannes Michael. Digital Heterodyne Laser Frequency Stabilization for Space-Based Gravitational Wave Detectors and Measuring Coating Brownian Noise at Cryogenic Temperatures.

Degree: PhD, Physics, 2015, University of Florida

The Laser Interferometric Gravitational-Wave Observatory project LIGO operates two facilities in the US that house kilometer-scale laser interferometers, in which differential length fluctuations are monitored in an attempt to detect gravitational waves. The propagation of these minute space-time perturbations, which are generated in observable magnitude only by violent astronomic events such as supernovae or binary mergers of massive objects like neutron stars and black holes, follows directly from the linearized Einstein equations. The LIGO sensitivity limit at and around 100Hz is heavily impacted by Brownian noise in the reflective coatings of its inertial test masses, which is a consequence of the fundamental fluctuation-dissipation theorem. Direct measurements of the mechanical loss in optical coatings that causes this noise across LIGO-relevant frequencies are rare, and many predictions rely on loss values that have been interpolated from observations at much higher frequencies. The main science objective of the work presented in this dissertation was the construction of a thermal noise test bed at the University of Florida to participate in the quest to find better coatings. A novel frequency stabilization method that we developed for potential implementation in the Laser Interferometer Space Antenna space mission LISA also finds an application in the THermal noise Optical Resonator experiment THOR. For the assessment of coating Brownian noise we expanded Advisors/Committee Members: MUELLER,GUIDO (committee chair), TANNER,DAVID B (committee member), WHITING,BERNARD F (committee member), SAWYER,WALLACE GREGORY (committee member).

Subjects/Keywords: Cryogenics; Interferometers; Laser interferometer gravitational wave observatory; Laser interferometer space antenna; Lasers; Noise measurement; Noise reduction; Noise temperature; Signals; Thermal noise; cryogenic  – frequency-stabilization  – gravitational-waves  – heterodyne  – thermal-noise

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Eichholz, J. M. (2015). Digital Heterodyne Laser Frequency Stabilization for Space-Based Gravitational Wave Detectors and Measuring Coating Brownian Noise at Cryogenic Temperatures. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0049565

Chicago Manual of Style (16th Edition):

Eichholz, Johannes Michael. “Digital Heterodyne Laser Frequency Stabilization for Space-Based Gravitational Wave Detectors and Measuring Coating Brownian Noise at Cryogenic Temperatures.” 2015. Doctoral Dissertation, University of Florida. Accessed October 29, 2020. https://ufdc.ufl.edu/UFE0049565.

MLA Handbook (7th Edition):

Eichholz, Johannes Michael. “Digital Heterodyne Laser Frequency Stabilization for Space-Based Gravitational Wave Detectors and Measuring Coating Brownian Noise at Cryogenic Temperatures.” 2015. Web. 29 Oct 2020.

Vancouver:

Eichholz JM. Digital Heterodyne Laser Frequency Stabilization for Space-Based Gravitational Wave Detectors and Measuring Coating Brownian Noise at Cryogenic Temperatures. [Internet] [Doctoral dissertation]. University of Florida; 2015. [cited 2020 Oct 29]. Available from: https://ufdc.ufl.edu/UFE0049565.

Council of Science Editors:

Eichholz JM. Digital Heterodyne Laser Frequency Stabilization for Space-Based Gravitational Wave Detectors and Measuring Coating Brownian Noise at Cryogenic Temperatures. [Doctoral Dissertation]. University of Florida; 2015. Available from: https://ufdc.ufl.edu/UFE0049565

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