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Dissertations / Theses on the topic 'Interferometric Sensors'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

Akhavan, Leilabady P. "Monomode fibre optic interferometric sensors." Thesis, University of Kent, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383964.

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2

Yupapin, P. V. P. "Optical pressure sensors using interferometric techniques." Thesis, City University London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357418.

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3

Cameron, Charles B., and Steven Lurie Garrett. "Recovering signals from optical fiber interferometric sensors." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28494.

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4

Ding, Binlei. "Development of High Resolution Interferometric Inertial Sensors." Doctoral thesis, Universite Libre de Bruxelles, 2021. https://dipot.ulb.ac.be/dspace/bitstream/2013/317532/4/content.pdf.

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The gravitational wave observatory and many other large ground-based instruments need to be decoupled from the Earth’s ever-present motion to improve their performance. In such scenarios, inertial sensors which measure the ground motion are necessary, especially those with a high resolution and a large dynamic range. This thesis aims to develop high performance inertial sensors which outperform the commercially available ones in terms of resolution and dynamic range in low frequency down to 0.01 Hz.Inertial sensors essentially consist of two parts: a single-degree-of-freedom mechanism and a tr

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5

Wu, Fang. "Study of fibre-optic interferometric 3-D sensors and frequency-modulated laser diode interferometry." Thesis, Liverpool John Moores University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313162.

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6

Tian, Zhaobing. "In-line optical fiber interferometric refractive index sensors." Thesis, Kingston, Ont. : [s.n.], 2008. http://hdl.handle.net/1974/1358.

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7

Chocarro, Ruiz Blanca. "Development of bimodal waveguide interferometric sensors for environmental monitoring." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/669867.

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La presente Tesis Doctoral está dedicada al desarrollo de novedosos sensores nanofotónicos como soluciones alternativas a las herramientas existentes de monitoreo medioambiental. En concreto, proponemos el uso de un novedoso sensor interferométrico, el dispositivo de guías de onda bimodales (BiMW), para el análisis selectivo, sensible, rápido y directo de contaminantes presentes en ambientes marinos y el aire. Para la detección de contaminantes en diferentes medios, agua y aire, se han seguido dos estrategias. La primera fue el desarrollo de un dispositivo biosensor basado en un inmunoensayo

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8

Thomas, Mikkel Andrey. "Integrated optical interferometric sensors on silicon and silicon cmos." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26674.

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The main objective of this research is to fabricate and characterize an optically integrated interferometric sensor on standard silicon and silicon CMOS circuitry. An optical sensor system of this nature would provide the high sensitivity and immunity to electromagnetic interference found in interferometric based sensors in a lightweight, compact package capable of being deployed in a multitude of situations inappropriate for standard sensor configurations. There are several challenges involved in implementing this system. These include the development of a suitable optical emitter for the sen

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9

Xiao, Hai. "Self-Calibrated Interferometric/Intensity-Based Fiber Optic Pressure Sensors." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/28845.

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To fulfill the objective of providing robust and reliable fiber optic pressure sensors capable of operating in harsh environments, this dissertation presents the detailed research work on the design, modeling, implementation, analysis, and performance evaluation of the novel fiber optic self-calibrated interferometric/intensity-based (SCIIB) pressure sensor system. By self-referencing its two channels outputs, for the first time to our knowledge, the developed SCIIB technology can fully compensate for the fluctuation of source power and the variations of fiber losses. Based on the SCIIB princ

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10

Wang, Zhiyong. "Self-Calibrated Interferometric/Intensity Based Fiber Optic Temperature Sensors." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/9690.

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To fulfill the objective of providing robust and reliable fiber optic temperature sensors capable of operating in harsh environments, a novel type of fiber optic sensor system titled self-calibrated interferometric/intensity-based (SCIIB) fiber optic temperature sensor system is presented in this thesis including the detailed research work on the principle analysis, design, modeling, implementation and performance evaluation of the system. The SCIIB fiber optic temperature sensor system shows us an innovative fiber optic sensor system compared with traditional fiber optic sensors. In addition

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11

Al-Raweshidy, Hamed S. "Spread spectrum multiplexing for passive optical fibre interferometric sensors." Thesis, University of Strathclyde, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.703110.

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12

Giorgi, Gianmarco <1991&gt. "Cloud technologies and data-driven algorithms for interferometric sensors." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10106/1/giorgi_gianmarco_tesi.pdf.

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The PhD project developed in these years started by studying the motivations behind Industry 4.0 and the most popular data-driven algorithms. The study was then oriented on the main success factors for the realization of a connected product continuing then for a study of the cloud in more detail. This study led me to analyze different components offered by the main providers, and to implement different solutions. The different solutions both at architectural and provider level allowed us to verify the differences between different implementations and their associated costs. The study of the

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13

Nuttavut, Narin. "Optical fibre sensors based on Bragg grating : an interferometric approach." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396042.

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14

Wang, Qi. "Studies of multimode fibre linked white light interferometric sensor systems." Thesis, City University London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389649.

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15

Ezbiri, A. "Passive signal processing techniques for miniature fibre fabry-perot interferometric sensors." Thesis, Cranfield University, 1996. http://dspace.lib.cranfield.ac.uk/handle/1826/11243.

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This thesis describes new signal processing techniques applicable to miniature low finesse Fabry-Perot interferometric sensors. The principle of operation behind the techniques presented resides in the use of the axial modes from a single multimode laser diode to produce a series of phrase shifted interferometric outputs in conjunction with the path imbalance of the sensor microactivity.

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16

Reid, Gregory John. "A technique for multiplexing 3x3-coupler terminated interferometric fiber-optic sensors." Thesis, Monterey, California. Naval Postgraduate School, 1993. http://hdl.handle.net/10945/39738.

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Approved for public release; distribution is unlimited.<br>This thesis investigates the multiplexing of Mach-Zehnder type 3x3 terminated fiber-optic sensors demodulated by either 'quadrature'or'symmetric' methods using intensity modulation of the source. 3x3-couplers produce signals that permit unmodulated passive demodulation of interferometric signals. The theory is described and the results of a 2xl element array optical demonstration are presented. Possible architectures using this demultiplexing technique are presented for several applications with different return line requirements. The

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17

Yu, Bing. "Development of Tunable Optical Filters for Interrogation of White-Light Interferometric Sensors." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/27496.

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Interferometric fiber optic sensors have been extensively used to measure a large variety of physical, chemical and biomedical parameters due to their superior performance. At the Center for Photonics Technology of Virginia Tech, a variety of interferometric fiber optic sensors have been developed in recent years, for efficient oil recovery, partial discharge detection in high voltage transformers, pressure sensing in gas turbine engines, and temperature measurements in gasifiers and boilers. However, interrogating an interferometric sensor involves accurate recovery of a measurand from the ph

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18

Schindler, Paul M. "Corrosion detection using metal coatings on fiber optic sensors." Thesis, Virginia Polytechnic Institute and State University, 1995. http://hdl.handle.net/10919/74546.

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Fiber optic sensors have been utilized as corrosion sensors by depositing metal coatings to the surface of the sensors. Three types of fiber optic sensors were investigated as candidates for corrosion detection: the extrinsic Fabry-Perot interferometer (EFPI), the absolute extrinsic Fabry-Perot interferometer (AEFPI), and the long period grating (LPG) fiber optic sensor. The corrosion monitoring technique used with the EFPI and AEFPI sensors exploits the ability of a thick coating of metal to maintain strain information in fiber optic strain sensors. The sensors are placed under tensile stress

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19

Marinis, Ryan Thomas. "Development and implementation of automated interferometric microscope for study of MEMS inertial sensors." Worcester, Mass. : Worcester Polytechnic Institute, 2009. http://www.wpi.edu/Pubs/ETD/Available/etd-050709-142910/.

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20

Flockhart, Gordon Marr Henderson. "Interferometric interrogation of optical fibre bragg grating sensors for temperature independent strain measurement." Thesis, Heriot-Watt University, 2001. http://hdl.handle.net/10399/381.

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21

Cranch, Geoffrey Alan. "Large-scale remotely interrogated arrays of fibre-optic interferometric sensors and fibre lasers." Thesis, Heriot-Watt University, 2001. http://hdl.handle.net/10399/1197.

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The development of fibre-optic interferometric sensor arrays for application in underwater acoustics has been an area of active research since the late 1970's. The technology has reached a level whereby prototype arrays have been successfully demonstrated in sea-trials. However, the recent development of several new technologies may significantly increase the size and performance of these arrays. We demonstrate the potential increase in multiplexed array sizes using architectures based on combining dense wavelength division multiplexing and time division multiplexing. These architectures also

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22

Ma, Cheng. "Modeling and Signal Processing of Low-Finesse Fabry-Perot Interferometric Fiber Optic Sensors." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/77225.

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This dissertation addresses several theoretical issues in low-finesse fiber optic Fabry-Perot Interferometric (FPI) sensors. The work is divided into two levels: modeling of the sensors, and signal processing based on White-Light-Interferometry (WLI). In the first chapter, the technical background of the low-finesse FPI sensor is briefly reviewed and the problems to be solved are highlighted. A model for low finesse Extrinsic FPI (EFPI) is developed in Chapter 2. The theory is experimentally proven using both single-mode and multimode fiber based EFPIs. The fringe visibility and the additional

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23

Reddington, Alexander P. "Instrument design and optimization of interferometric reflectance imaging sensors for in vitro diagnostics." Thesis, Boston University, 2014. https://hdl.handle.net/2144/11031.

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Thesis (Ph.D.)--Boston University<br>In the field of drug discovery and disease diagnostics, protein microarrays have generated much enthusiasm for their high-throughput monitoring of biomarkers; however, this technology has yet to translate from research laboratories to commercialization. The hindrance is the considerable uncertainty and skepticism regarding data obtained. The disparity in results from different laboratories performing identical tests is attributed to a lack of assay quality control. Unlike DNA microarrays, protein microarrays have a higher level of bioreceptor immobilization

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24

Lione, Richard. "The study of heats of adsorption of gases of thin organic films using a novel interferometric micro-calorimeter." Thesis, University of Kent, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358168.

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25

Monsky, Anneke [Verfasser]. "Understanding interferometric drag-free sensors in space using intelligent data analysis tools / Anneke Monsky." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover, 2010. http://d-nb.info/1008374849/34.

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26

Gerges, Awad Samir. "Novel fibre-optic-based interferometric sensors exploiting coherent and low-coherence signal processing techniques." Thesis, University of Kent, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236854.

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27

Han, Ming. "Theoretical and Experimental Study of Low-Finesse Extrinsic Fabry-Perot Interferometric Fiber Optic Sensors." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/27825.

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In this report, detailed and systematic theoretical and experimental study of low-finesse extrinsic Fabry-Perot interferometric (EFPI) fiber optic sensors together with their signal processing methods for white-light systems are presented. The work aims to provide a better understanding of the operational principle of EFPI fiber optic sensors, and is useful and important in the design, optimization, fabrication and application of single mode fiber(SMF) EFPI (SMF-EFPI) and multimode fiber (MMF) EFPI (MMF-EFPI) sensor systems. The cases for SMF-EFPI and MMF-EFPI sensors are separately considered

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28

Deng, Jiangdong. "Development of Novel Optical Fiber Interferometric Sensors with High Sensitivity for Acoustic Emission Detection." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/29286.

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For the purpose of developing a new highly-sensitive and reliable fiber optical acoustic sensor capable of real-time on-line detection of acoustic emissions in power transformers, this dissertation presents the comprehensive research work on the theory, modeling, design, instrumentation, noise analysis, and performance evaluation of a diaphragm-based optical fiber acoustic (DOFIA) sensor system. The optical interference theory and the diaphragm dynamic vibration analysis form the two foundation stones of the diaphragm-based optical fiber interferomtric acoustic (DOFIA) sensor. Combining thes

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29

Liu, Hanying. "Development of Fabry-Perot Interferometric Sensors for safety-related applications in Nuclear Power Plants /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486399451960947.

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30

Etches, J. A. "Interfacial and durability aspects of extrinsic Fabry-Perot interferometric sensors in carbon fibre composites." Thesis, Cranfield University, 2003. http://hdl.handle.net/1826/779.

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This thesis is concerned with the interfacial and durability aspects of Extrinsic Fabry- Perot Interferometric (EFPI) sensors embedded in carbon fibre reinforced composites. Fibre optic sensors are being used in many long term applications and, as is the case for all sensor types, the ability of the EFPI sensors to monitor accurately the measurands of interest over the lifetime of the structure must be proved. Therefore, the aim of this work was to examine the interface between the EFPI sensors and the structures, and then to evaluate the durability of that interface and the sensors. The first

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31

Bhatnagar, Mohit. "Multiplexing of interferometric fiber optic sensors for smart structure applications using spread spectrum techniques." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12052009-020246/.

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32

Schake, Markus C. [Verfasser]. "Advanced theory of optical wave propagation and interferometric sensors for topography measurement / Markus C. Schake." Kassel : kassel university press c/o Universität Kassel - Universitätsbibliothek, 2020. http://d-nb.info/1217023550/34.

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33

Huang, Zhengyu. "Quasi-Distributed Intrinsic Fabry-Perot Interferometric Fiber Sensor for Temperature and Strain Sensing." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/26247.

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The motivation of this research is to meet the growing demand for the measurand high-resolution, high-spatial resolution, attenuation insensitive and low-cost quasi-distributed temperature and strain sensors that can reliably work under harsh environment or in extended structures. There are two main drives for distributed fiber sensor research. The first is to lower cost-per-sensor so that the fiber sensors may become price-competitive against electrical sensors in order to gain widespread acceptance. The second is to obtain spatial distribution of the measurand. This dissertation presents det

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34

Zhao, Xin. "Study of Multimode Extrinsic Fabry-Perot Interferometric Fiber Optic Sensor on Biosensing." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34534.

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The electrostatic self-assembly (ESA) method presents an effective application in the field of biosensing due to the uniform nanoscale structure. In previous research, a single mode fiber (SMF) sensor system had been investigated for the thin-film measurement due to the high fringe visibility. However, compared with a SMF sensor system, a multimode fiber (MMF) sensor system is lower-cost and has larger sensing area (the fiber core), providing the potential for higher sensing efficiency. <p> In this thesis, a multimode fiber-optic sensor has been developed based on extrinsic Fabry-Perot in

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35

Krause, Amanda Rochelle. "Characterization Study of Plasma Spray Attachment of Intrinsic Fabry-Perot Interferometric Sensors in Power Generation Applications." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/76798.

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The purpose of this study is to characterize the plasma spray deposits used for attaching intrinsic Fabry-Perot interferometric fiber optic strain sensors. The deposits must maintain adhesion at elevated temperatures without distorting the sensors' signals. Two different material systems were tested and modeled, a nickel based alloy and yttria-stabilized zirconia. The material properties of the deposits and the thermal stresses in the system were evaluated to determine attachment lifetime of the sensors. The encapsulated sensors' signals were collected before and after plasma spraying and at e

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36

Shen, Fabin. "UV-Induced Intrinsic Fabry-Perot Interferometric Fiber Sensors and Their Multiplexing for Quasi-Distributed Temperature and Strain Sensing." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28053.

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Distributed temperature and strain sensing is demanded for a wide range of applications including real-time monitoring of industrial processes, health monitoring of civil infrastructures, etc. Optical fiber distributed sensors have attracted tremendous research interests in the past decade to meet the requirements of such applications. This research presents a multiplexed sensor array for distributed temperature and strain sensing that can multiplex a large number of UV-induced sensors along a single fiber. The objective of this research is to develop a quasi-distributed sensing technology th

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37

Van, der Merwe David Johannes. "Considerations for the implementation of the radio interferometric positioning system on a single wireless node / van der Merwe D.J." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7320.

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The ability to localise objects and persons is a useful ability, that is currently used in everyday life in the form of Global Positioning System (GPS) navigation. Localisation is also useful in data networks. The ability to localise nodes in a network paves the way for applications such as location based services, beamforming and geographic routing. The Radio Interferometric Positioning System (RIPS), is a method originally designed for localisation in wireless sensor networks. RIPS is a promising method due to the fact that it is capable of localisation with high accuracy over long ranges. T

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38

Pipia, Luca. "Polarimetric differential SAR Interferometry with ground-based sensors." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/6951.

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Las técnicas de Interferometría Diferencial se basan en la combinación de varias imágenes SAR con distinta separación temporal y permiten la recuperación de las componentes lineales y no-lineales del proceso de deformación ocurrida en el entorno de interés durante el entero periodo de observación. Condición imprescindible para una correcta estimación de los fenómenos geodéticos es la elevada estabilidad de la plataforma que embarca el sensor SAR. Por esta razón, a nivel operativo se utilizan datos SAR satelitales.<br/>El objetivo de la Polarimetría SAR es describir el entorno de interés analiz

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39

Menezes, Jacson Weber de. "Fabricação e caracterização de estruturas periódicas utilizando superposição de padrões de interferência para aplicações em fotônica e plasmônica." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260707.

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Orientadores: Edmundo da Silva Braga, Lucila Helena Deliesposte Cescato<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-16T22:14:56Z (GMT). No. of bitstreams: 1 Menezes_JacsonWeberde_D.pdf: 5102435 bytes, checksum: 8671ed8cf6b070b06a3270b5e81fde66 (MD5) Previous issue date: 2010<br>Resumo: Esta tese tem como objetivo demonstrar a viabilidade e o potencial da técnica de superposição de padrões de interferência para fabricação de estruturas periódicas 2D e 3D para aplicações em cristais fotônicos e

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40

Wang, Dong Ning. "White light interferometric sensor systems." Thesis, City University London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283188.

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41

Kim, Byungki. "Miniaturized Diffraction Based Interferometric Distance Measurement Sensor." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5044.

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In this thesis, new metrology hardware is designed, fabricated, and tested to provide improvements over current MEMS metrology. The metrology system is a micromachined scanning interferometer having a sub-nm resolution in a compact design. The proposed microinterferometer forms a phase sensitive diffraction grating with interferometric sensitivity, while adding the capability of better lateral resolution by focusing the laser to a smaller spot size. A detailed diffraction model of the microinterferometer was developed to simulate the device performance and to suggest the location of photo dete

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42

Liao, Yi. "Next generation heavily multiplexed interferometric sensor arrays." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/353971/.

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Permanent reservoir monitoring (PRM) is an emerging market with significant potential in the oil and gas industrials, where data from several thousand pressure and acceleration sensors are used to monitor the condition of an underground hydrocarbon reservoir. Fibre-optic sensor arrays offer significant potential benefits, and highly efficient multiplexing and telemetry architectures can combine the several thousand sensors onto just a few fibres, the fewer the better. This study presents a novel, high performance interferometric fibre-optic sensor array using a distributed erbium doped fibre a

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43

Zeakes, Jason S. "Extrinsic Fabry-Perot Interferometric hydrogen gas sensor." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06162009-063525/.

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44

Wavering, Thomas A. "Optical Path Length Multiplexing of Optical Fiber Sensors." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36037.

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Optical fiber sensor multiplexing reduces cost per sensor by designing a system that minimizes the expensive system components (sources, spectrometers, etc.) needed for a set number of sensors. The market for multiplexed optical sensors is growing as fiberoptic sensors are finding application in automated factories, mines, offshore platforms, air, sea, land, and space vehicles, energy distribution systems, medical patient surveillance systems, etc. Optical path length multiplexing (OPLM) is a modification to traditional white-light interferometry techniques to multiplex extrinsic Fabry-Perot i

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45

Xie, Zhaoxia. "Two applications of the Fabry-Perot interferometric sensor." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1019.

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46

Basden, Alastair Graham. "A fast spectro-interferometric sensor for the COAST." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616221.

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47

Farahi, F. "Fibre optic interferometric thermometers and multiplexed systems." Thesis, University of Kent, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382854.

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48

Richardson, Douglas Harvey. "Fiber optic interferometric torque sensor with applications to milling." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/30056.

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To make unmanned machining viable it is necessary to monitor the machining process. The currently available sensor technology is not adequate to monitor all of the required aspects of the machining process. In this thesis a fiber optic milling machine torque sensor is proposed and experimentally analyzed. The initial tests, at low torque amplitudes, performed on the experimental prototype indicate that the proposed sensor may have performance characteristics which are superior to the characteristics of the currently used milling machine sensors. The proposed sensor has the advantages of sma

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49

McKie, Andrew Duncan William. "Applications of laser generated ultrasound using an interferometric sensor." Thesis, University of Hull, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327987.

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50

Bermuske, Mike, Lars Büttner, and Jürgen Czarske. "Measurement uncertainty budget of an interferometric flow velocity sensor." SPIE, 2017. https://tud.qucosa.de/id/qucosa%3A35151.

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Flow rate measurements are a common topic for process monitoring in chemical engineering and food industry. To achieve the requested low uncertainties of 0:1% for flow rate measurements, a precise measurement of the shear layers of such flows is necessary. The Laser Doppler Velocimeter (LDV) is an established method for measuring local flow velocities. For exact estimation of the flow rate, the flow profile in the shear layer is of importance. For standard LDV the axial resolution and therefore the number of measurement points in the shear layer is defined by the length of the measurement volu

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