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MODS Metadata of Development of a multi-point temperature fiber sensor based on a serial array of optical fiber interferometers

roleTerm ( text )
advisor 
namePart
Martinez, R., Dr. 
roleTerm ( text )
author 
namePart
Della Tamin, Michelin 
dateAccessioned
2015-06-29T09:03:19Z 
dateAvailable
2015-06-29T09:03:19Z 
dateIssued
2015-06-29 
dateSubmitted
2014 
identifier ( uri )
http://hdl.handle.net/10210/13823 
note
M.Ing. (Electrical and Electronic Engineering) 
abstract
An experimental study of a multi-point optic fibre sensor for monitoring temperature changes is presented. The multi-point optic fibre sensor is made of a serial array of weak-reflectivity identical gratings. The weak-reflectivity identical gratings form the interferometric cavities UV printed on the single mode fibre. The ability to measure temperatures changes at different cavities along the serial array is particularly interesting for the monitoring of power transformers, high temperature furnaces and jet engines. Changes in temperature in each respective cavity is measured based on the spectral shift in the phase of the light from each respective cavity. The performance of the multi-point fibre sensor system is evaluated. Further, a theoretical and experimental investigation of a serial array composed of two cavities of different lengths is conducted. This investigation is aimed at measuring the impact of the overlap of the two distinct cavities in their respective frequency domain and determining the accuracy of the measurement. The result found shows that the sensor phase response is no more linear to temperature changes. It is also found that the nonlinear response of the sensor to temperature changes increases with the magnitude of the overlap. 
languageTerm ( rfc3066 )
en 
accessCondition ( useAndReproduction )
University of Johannesburg 
topic
Interferometers 
topic
Optical fibers 
topic
Bragg gratings 
topic
Optical fiber detectors 
title
Development of a multi-point temperature fiber sensor based on a serial array of optical fiber interferometers 
genre
Thesis 

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http://hdl.handle.net/10210/38705
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