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dc.contributor.advisorGuzman, Felipe
dc.contributor.advisorAnderson, Brian P.
dc.contributor.authorZhang, Yanqi
dc.creatorZhang, Yanqi
dc.date.accessioned2022-07-15T19:02:38Z
dc.date.available2022-07-15T19:02:38Z
dc.date.issued2022
dc.identifier.citationZhang, Yanqi. (2022). Optical Readout Systems for Optomechanical Inertial Sensors (Doctoral dissertation, University of Arizona, Tucson, USA).
dc.identifier.urihttp://hdl.handle.net/10150/665405
dc.description.abstractThe advancement of a compact optomechanical inertial sensor with ultra-high acceleration sensitivity in the sub-Hz regime requires its optical readout system to have a small footprint, low noise floor, and large dynamic range. In this dissertation, three optical readout systems are designed based on common-mode heterodyne interferometry, including a compact interferometer with off-the-shelf optical components, a customized quasi-monolithic interferometer assembly, and a two-wavelength fiberbased interferometer. A benchtop prototype of each configuration is developed and tested in the lab. Preliminary measurements show that all three instruments reached single-digit picometer level sensitivity above 1 Hz and sub-nanometer level sensitivity in the millihertz regime. Investigations are conducted regarding common noise sources in the low-frequency regime, such as laser frequency noises and temperature fluctuations. The corresponding post-processing algorithms are developed to mitigate these noise effects and improve the instrument sensitivity. Furthermore, the optical readout systems are integrated with a tunable optomechanical inertial sensor design to provide a sub-picometer level of sensitivity and large bandwidth capable of measuring seismic activities. Details of the feedback damping system in this inertial sensor are designed with a novel cascaded cooling system to improve the cooling efficiency with less radiation pressure actuation.
dc.language.isoen
dc.publisherThe University of Arizona.
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction, presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleOptical Readout Systems for Optomechanical Inertial Sensors
dc.typetext
dc.typeElectronic Dissertation
thesis.degree.grantorUniversity of Arizona
thesis.degree.leveldoctoral
dc.contributor.committeememberWilson, Dalziel
thesis.degree.disciplineGraduate College
thesis.degree.disciplineOptical Sciences
thesis.degree.namePh.D.
refterms.dateFOA2022-07-15T19:02:38Z


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