Distributed temperature sensors based on modified-cladding optical-fibers

Keywords

Modified-cladding optical-fiber sensors, Optical time-domain reflectometry (OTDR) techniques, Fresnel reflection modeling, Silicone rubber elastomer sensing layer, Relative transmission loss sensitivity (-0.0072 dB/°C)

Abstract

The measurement of temperature along optical fibers using an optical time domain reflectometer (OTDR) is discussed. A review of optical principles used to design a distributed temperature measurement system is included. Mathematical expressions for the back-reflected power coefficient due to thermal disturbance at the modified-cladding section are provided. The theoretical analysis is based on geometrical optics and Fresnel reflection. The measurement method makes use of optical radar techniques to obtain the range information along a test fiber. A silicone rubber elastomer is chosen as a temperature sensitive modified-cladding material. For distributed modified-cladding sections, the relative transmission loss is measured. A sensitivity of - 0.0072 dB/°C at each sensing region was obtained on OTDR. A comparison between theory and experimental results is carried out. The theory is sufficient to predict the behavior of the modified-cladding section depending on temperature.

Notes

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Graduation Date

1988

Semester

Summer

Advisor

Walters, Roy A.

Degree

Master of Science (M.S.)

College

College of Engineering

Department

Electrical Engineering and Communication Sciences

Format

Print

Pages

92 pages

Language

English

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

Location

Orlando (Main) Campus

Identifier

DP0026676

Subjects

Dissertations; Academic -- Engineering; Engineering -- Dissertations; Academic; Optical fiber detectors--Design and construction; Temperature measurements--Remote sensing; Optical fibers--Measurement; Time-domain reflectometry; Optical fibers--Materials

Accessibility Status

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