{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/73370"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/73370","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Fiber-Optic Michelson Interferometer with Faraday Mirrors for Acoustic Sensing using a 3 × 3 Coupler and Symmetric Demodulation Scheme","abstract":"For the past 40 years, acoustic sensing has been a major avenue for the growth of interfero- metric fiber-optic sensors. Fiber-optic acoustic sensors have found uses in military, commer- cial, and medical applications. An interferometric fiber-optic acoustic sensor is presented utilizing the Michelson interferometer configuration with Faraday mirrors to eliminate po- larization fading. A 3 × 3 coupler is used as the beamsplitting component, and a symmetric demodulation algorithm is applied to recover the phase signal. This sensor has a theoretical resolution of 5.5 pico-strains and room to improve. Such improvements are discussed in the conclusion.","abstract_html":"For the past 40 years, acoustic sensing has been a major avenue for the growth of interfero- metric fiber-optic sensors. Fiber-optic acoustic sensors have found uses in military, commer- cial, and medical applications. An interferometric fiber-optic acoustic sensor is presented utilizing the Michelson interferometer configuration with Faraday mirrors to eliminate po- larization fading. A 3 × 3 coupler is used as the beamsplitting component, and a symmetric demodulation algorithm is applied to recover the phase signal. This sensor has a theoretical resolution of 5.5 pico-strains and room to improve. 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Fiber-optic acoustic sensors have found uses in military, commer- cial, and medical applications. An interferometric fiber-optic acoustic sensor is presented utilizing the Michelson interferometer configuration with Faraday mirrors to eliminate po- larization fading. A 3 × 3 coupler is used as the beamsplitting component, and a symmetric demodulation algorithm is applied to recover the phase signal. This sensor has a theoretical resolution of 5.5 pico-strains and room to improve. Such improvements are discussed in the conclusion."]},{"key":"dc:description.abstractgeneral","label":"General Abstract","values":["For the past 40 years, acoustic sensing has been a major avenue for the growth of fiber-optic sensors. The optical fiber itself acts essentially like a microphone that is sensitive to acoustic emissions in the audible range up into the ultrasonic range. Because of the fiber’s innate resistance to harsh environments, fiber-optic acoustic sensors have found uses in military, commercial, and, more recently, medical applications. The extremely high sensitivity achievable with a fiber-optic acoustic sensor is demonstrated using a simple arrangement of now readily available fiber-optic components and digital signal processing."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["ETD"]},{"key":"dc:title","label":"Title","values":["Fiber-Optic Michelson Interferometer with Faraday Mirrors for Acoustic Sensing using a 3 × 3 Coupler and Symmetric Demodulation Scheme"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Wang, Anbo"],"dc:contributor.committeemember":["Zhu, Yizheng","Safaai-Jazi, Ahmad"],"dc:contributor.department":["Electrical and Computer Engineering"],"dc:creator":["Gartland, Peter Lanier"],"dc:date.accessioned":["2016-11-03T08:00:34Z"],"dc:date.available":["2016-11-03T08:00:34Z"],"dc:date.issued":["2016-11-02"],"dc:description.abstract":["For the past 40 years, acoustic sensing has been a major avenue for the growth of interfero- metric fiber-optic sensors. Fiber-optic acoustic sensors have found uses in military, commer- cial, and medical applications. An interferometric fiber-optic acoustic sensor is presented utilizing the Michelson interferometer configuration with Faraday mirrors to eliminate po- larization fading. A 3 × 3 coupler is used as the beamsplitting component, and a symmetric demodulation algorithm is applied to recover the phase signal. This sensor has a theoretical resolution of 5.5 pico-strains and room to improve. Such improvements are discussed in the conclusion."],"dc:description.abstractgeneral":["For the past 40 years, acoustic sensing has been a major avenue for the growth of fiber-optic sensors. The optical fiber itself acts essentially like a microphone that is sensitive to acoustic emissions in the audible range up into the ultrasonic range. Because of the fiber’s innate resistance to harsh environments, fiber-optic acoustic sensors have found uses in military, commercial, and, more recently, medical applications. The extremely high sensitivity achievable with a fiber-optic acoustic sensor is demonstrated using a simple arrangement of now readily available fiber-optic components and digital signal processing."],"dc:description.degree":["Master of Science"],"dc:format.medium":["ETD"],"dc:identifier.other":["vt_gsexam:9056"],"dc:identifier.uri":["http://hdl.handle.net/10919/73370"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["Fiber Optics","Michelson Interferometer","3 x 3 Coupler","Acoustic Sensing"],"dc:title":["Fiber-Optic Michelson Interferometer with Faraday Mirrors for Acoustic Sensing using a 3 × 3 Coupler and Symmetric Demodulation Scheme"],"dc:type":["Thesis"],"thesis:degree_discipline":["Electrical Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:19:31Z"}