Characterization of fiber optic sensor for liquid refractive index monitoring

This research was conducted to characterize the fiber optic sensor for liquid refractive index monitoring. The sensor system consists of a light source, a 2x2 single mode fused fiber coupler of different coupling ratios and a detector. Diode laser operating at wavelength 1300 nm and 1550 nm was used...

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Main Author: Shafei, Dianay Shafina
Format: Thesis
Language:English
Published: 2015
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Online Access:http://eprints.utm.my/id/eprint/54665/25/DianayShafinaShafeiMFS2015.pdf
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spelling my-utm-ep.546652020-11-03T07:43:33Z Characterization of fiber optic sensor for liquid refractive index monitoring 2015-03 Shafei, Dianay Shafina QC Physics This research was conducted to characterize the fiber optic sensor for liquid refractive index monitoring. The sensor system consists of a light source, a 2x2 single mode fused fiber coupler of different coupling ratios and a detector. Diode laser operating at wavelength 1300 nm and 1550 nm was used as a light source. Fresnel’s Law of reflection from the fiber-air and fiber-liquid interface was the fundamental of this work. The total reflected light intensity from both coupler outputs was measured in terms of its power. A simple test on the feasibility of the sensor for this type of measurement was conducted and it was found that this sensor was sensitive enough and has a reasonable working range to work with. The refractive index of a solution is a function of its concentration, temperature and also the wavelength of the incident light. In this work the relation of these parameters were investigated. The solution of NaCl was selected as a liquid sample. Various concentrations of salt solution ranging from 0 % - 24 % were tested and were heated from 30 ºC - 90 ºC to observe the change in refractive index. The results revealed that the refractive index of liquid solutions varies linearly with its concentration and temperature. Performance of the sensor system by using single mode fused fiber coupler with different coupling ratio was studied. It was observed that the fiber coupler with 50:50 indicated the highest sensitivity to be used in this sensor system. 2015-03 Thesis http://eprints.utm.my/id/eprint/54665/ http://eprints.utm.my/id/eprint/54665/25/DianayShafinaShafeiMFS2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:86569 masters Universiti Teknologi Malaysia, Faculty of science Faculty of science
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic QC Physics
spellingShingle QC Physics
Shafei, Dianay Shafina
Characterization of fiber optic sensor for liquid refractive index monitoring
description This research was conducted to characterize the fiber optic sensor for liquid refractive index monitoring. The sensor system consists of a light source, a 2x2 single mode fused fiber coupler of different coupling ratios and a detector. Diode laser operating at wavelength 1300 nm and 1550 nm was used as a light source. Fresnel’s Law of reflection from the fiber-air and fiber-liquid interface was the fundamental of this work. The total reflected light intensity from both coupler outputs was measured in terms of its power. A simple test on the feasibility of the sensor for this type of measurement was conducted and it was found that this sensor was sensitive enough and has a reasonable working range to work with. The refractive index of a solution is a function of its concentration, temperature and also the wavelength of the incident light. In this work the relation of these parameters were investigated. The solution of NaCl was selected as a liquid sample. Various concentrations of salt solution ranging from 0 % - 24 % were tested and were heated from 30 ºC - 90 ºC to observe the change in refractive index. The results revealed that the refractive index of liquid solutions varies linearly with its concentration and temperature. Performance of the sensor system by using single mode fused fiber coupler with different coupling ratio was studied. It was observed that the fiber coupler with 50:50 indicated the highest sensitivity to be used in this sensor system.
format Thesis
qualification_level Master's degree
author Shafei, Dianay Shafina
author_facet Shafei, Dianay Shafina
author_sort Shafei, Dianay Shafina
title Characterization of fiber optic sensor for liquid refractive index monitoring
title_short Characterization of fiber optic sensor for liquid refractive index monitoring
title_full Characterization of fiber optic sensor for liquid refractive index monitoring
title_fullStr Characterization of fiber optic sensor for liquid refractive index monitoring
title_full_unstemmed Characterization of fiber optic sensor for liquid refractive index monitoring
title_sort characterization of fiber optic sensor for liquid refractive index monitoring
granting_institution Universiti Teknologi Malaysia, Faculty of science
granting_department Faculty of science
publishDate 2015
url http://eprints.utm.my/id/eprint/54665/25/DianayShafinaShafeiMFS2015.pdf
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