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dc.contributor.authorWang, Jiajunen_US
dc.date.accessioned2017-04-06T15:43:11Z
dc.date.available2017-04-06T15:43:11Z
dc.date.issued2011-01-19en_US
dc.identifier.otheretd-01182011-140606en_US
dc.identifier.urihttp://hdl.handle.net/10919/77149
dc.description.abstractSapphire fiber has been studied intensively for harsh environment sensing in the past two decades due to its supreme mechanical, physical and optical properties. It is by far the most reported and likely the best optical fiber based sensing technology for sensing applications in temperature beyond 1000°C. Several sensing schemes have been proposed and studied to date including sapphire fiber extrinsic and intrinsic Fabry-Perot interferometers, fiber Bragg gratings and long period gratings inscribed in sapphire fibers. Lacking the cladding, sapphire fiber is highly multi-moded which renders sapphire fiber based sensor fabrication much more difficult than those based on silica fibers. Among all the reported work on sapphire fiber sensing, the vast majority is for single point temperature measurement. In this work, different sensing schemes are proposed to enhance the capability of the sapphire fiber based sensing technology. For the single point sensing, a miniaturized sapphire fiber temperature sensor for embedded sensing applications was proposed and studied. The sensors are no more than 75 µm in diameter and are ideal for non-invasive embedded sensing applications. Unlike existing sapphire fiber sensors, the thin film sensors are batch-fabrication oriented and thus have a potential to permit mass production with low cost. In addition to single point sensors, multiplexed sapphire fiber sensing systems are investigated for the first time. Two multiplexed sensing solutions, named frequency-multiplexing and spatial-multiplexing, are proposed and studied to achieve multiplexed sensing based on sapphire fibers.
dc.language.isoen_USen_US
dc.publisherVirginia Techen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectmultiplexeden_US
dc.subjectharsh environmenten_US
dc.subjecthigh temperatureen_US
dc.subjectsensingen_US
dc.subjectsapphire fiberen_US
dc.subjectminiaturizeden_US
dc.subjectthin filmen_US
dc.subjectwaferen_US
dc.titleSapphire Fiber Based Sensing Technologies for High Temperature Applicationsen_US
dc.typeDissertationen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
dc.contributor.committeechairWang, Anboen_US
dc.contributor.committeememberXu, Yongen_US
dc.contributor.committeememberPoon, Ting Chungen_US
dc.contributor.committeememberPickrell, Gary R.en_US
dc.contributor.committeememberGuido, Louis J.en_US
dc.type.dcmitypeTexten_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01182011-140606/en_US
dc.date.sdate2011-01-18en_US
dc.date.rdate2016-10-18
dc.date.adate2011-03-11en_US


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