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dc.contributor.authorWang, Zhuangen_US
dc.date.accessioned2014-03-14T20:21:02Z
dc.date.available2014-03-14T20:21:02Z
dc.date.issued2006-12-14en_US
dc.identifier.otheretd-12212006-203046en_US
dc.identifier.urihttp://hdl.handle.net/10919/30213
dc.description.abstractThe health monitoring of smart structures in civil engineering is becoming more and more important as in-situ structural monitoring would greatly reduce structure life-cycle costs and improve reliability. The distributed strain and temperature sensing is highly desired in large structures where strain and temperature at over thousand points need to be measured simultaneously. It is difficult to carry out this task using conventional electrical strain sensors. Fiber optic sensors provide an excellent opportunity to fulfill this need due to their capability to multiplex many sensors along a single fiber cable. Numerous research studies have been conducted in past decades to increase the number of sensors to be multiplexed in a distributed sensor network. This dissertation presents detailed research work on the analysis, design, fabrication, testing, and evaluation of an intrinsic Fabry-Perot fiber optic sensor for quasi-distributed strain and temperature measurements. The sensor is based on two ultra-short and broadband reflection fiber Bragg gratings. One distinct feature of this sensor is its ultra low optical insertion loss, which allows a significant increase in the sensor multiplexing capability. Using a simple integrated sensor interrogation unit and an optical spectrum based signal processing algorithm, many sensors can be interrogated along a single optical fiber with high accuracy, high resolution and large dynamic range. Based on the experimental results and theoretical analysis, it is expected that more than 500 sensors can be multiplexed with little crosstalk using a frequency-division multiplexing technology. With this research, it is possible to build an easy fabrication, robust, high sensitivity and quasi-distributed fiber optic sensor network that can be operated reliably even in harsh environments or extended structures. This research was supported in part by U.S. National Science Foundation under grant CMS-0427951.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartdissertation_zhuang2006.pdfen_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.subjectFiber Bragg Gratingen_US
dc.subjectFabry-Peroten_US
dc.subjectMultiplexingen_US
dc.subjectFiber Optic Sensoren_US
dc.subjectTemperatureen_US
dc.subjectStrainen_US
dc.subjectSmart Structureen_US
dc.subjectHealth Monitoringen_US
dc.titleIntrinsic Fabry-Perot Interferometric Fiber Sensor Based on Ultra-Short Bragg Gratings for Quasi-Distributed Strain and Temperature Measurementsen_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.committeememberMeehan, Kathleenen_US
dc.contributor.committeememberHeflin, James R.en_US
dc.contributor.committeememberJacobs, Iraen_US
dc.contributor.committeememberLiu, Yiluen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12212006-203046/en_US
dc.date.sdate2006-12-21en_US
dc.date.rdate2007-02-02
dc.date.adate2007-02-02en_US


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