Simultaneous measurement of strain and temperature using two-mode elliptical core optical fiber

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dc.contributor.authorWang, Zhi G.en
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:31:28Zen
dc.date.adate2009-03-12en
dc.date.available2014-03-14T21:31:28Zen
dc.date.issued1992en
dc.date.rdate2009-03-12en
dc.date.sdate2009-03-12en
dc.description.abstractA single piece of optical fiber can be utilized to sense both strain and temperature simultaneously. To develop such a sensor, we sandwich a section of two-mode elliptical core (e-core) fiber between two partially reflecting mirrors. This configuration can be considered as an intrinsic Fabry-Perot interferometer, in which the two-mode, e-core fiber serves as the resonant cavity. Two different types of phase modulation can be extracted under perturbations of strain and temperature on the fiber. These phase changes are due to the two-mode interference and intrinsic Fabry-Perot interference, respectively. The relationship between the phase information and the two physical measurands, i.e. strain and temperature, can be established using two coupled equations, in which the strain and temperature are considered as two unknowns. By solving these two coupled equations, we can simultaneously determine the strain and temperature. The waveguide theory and the Cross sensitivity analysis of this sensor are presented. The descriptions of four independent experiments that have been used to determine the coefficients of the two coupled equations are given. The resolutions of the strain and temperature measurements have been obtained to be 31 μm/m and 4.5 °C, respectively.en
dc.description.degreeMaster of Scienceen
dc.format.extentv, 48 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03122009-041834en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03122009-041834/en
dc.identifier.urihttp://hdl.handle.net/10919/41527en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1992.W364.pdfen
dc.relation.isformatofOCLC# 26645712en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1992.W364en
dc.subject.lcshOptical fibers -- Temperatureen
dc.subject.lcshThermoelastic stress analysisen
dc.titleSimultaneous measurement of strain and temperature using two-mode elliptical core optical fiberen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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