The properties of single crystal sapphire fibers and the polarimetric optical sensor for high temperature measurements

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dc.contributor.authorZhang, Pinyien
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:51:01Zen
dc.date.adate2009-12-04en
dc.date.available2014-03-14T21:51:01Zen
dc.date.issued1994en
dc.date.rdate2009-12-04en
dc.date.sdate2009-12-04en
dc.description.abstractThe polarization-maintaining properties of single crystal sapphire fibers are investigated and a polarimetric optical sensor for high temperature measurements is designed. The polarization-maintaining properties of single crystal sapphire fibers are investigated experimentally for different modal power distributions and different fiber lengths. Experimental results indicate that linearly polarized light launched along one of the principal axes of the birefringence can be partially maintained. The polarization-maintaining ability (PMA) has been measured to be 6 dB and 3 dB for 7 cm and 32 cm long sapphire fibers, respectively. The temperature coefficient of the differential phase delay between the orthogonal polarization modes has been measured to be 0.0208 rad / °C m. A resolution of 2 °C has been obtained over the measurement range of 25 °C to 800 °C. It is also observed that the PMA is strongly dependent on the mode-coupling parameter. The design of the polarimetric sapphire fiber sensor for high temperature measurements is based on the properties of withstanding high temperatures, polarization preservation and temperature dependence of phase delay. Since the temperature dependence of phase delay is proportional to the fiber length, consideration of a similar strain sensor is expected in the near future.en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 79 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-12042009-020350en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12042009-020350/en
dc.identifier.urihttp://hdl.handle.net/10919/46121en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1994.Z536.pdfen
dc.relation.isformatofOCLC# 30505909en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1994.Z536en
dc.subject.lcshOptical fibersen
dc.titleThe properties of single crystal sapphire fibers and the polarimetric optical sensor for high temperature measurementsen
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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