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Proceedings Paper

Displacement sensor based on optical fibre with multiple overlapping imperfections
Author(s): Eli Vilge; Moshe Levantovsky; Yoel Arieli; Hans Poisel; Anatoly Babchenko
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Paper Abstract

The concept of highly sensitive fibre optic displacement sensor is presented. It is based on macrobending step index polymer optical fibre with multiple overlapping surface-side imperfections. The theoretical principles of optical power losses in such fibres due to multiple curvatures are based on a surface that serves as a model for an imperfect layer and has the same optical properties. The sensing element was tested using two different types of roughness topologies and their combination. The various angles of imperfections (90 and 45 degrees) placed on the fibre's core were evaluated. We discuss some experimental results that confirm our prediction of considerable dependence of the output signal on the changing imperfections caused by bending the fibre. It was found that sensitivity to bending of the angular imperfections could be further increased by implementing multiple overlapping imperfections.

Paper Details

Date Published: 2 July 2007
PDF: 4 pages
Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66190R (2 July 2007); doi: 10.1117/12.738355
Show Author Affiliations
Eli Vilge, Jerusalem College of Technology (Israel)
Moshe Levantovsky, Jerusalem College of Technology (Israel)
Yoel Arieli, Jerusalem College of Technology (Israel)
Hans Poisel, Univ. of Applied Sciences Nuremberg (Germany)
Anatoly Babchenko, Jerusalem College of Technology (Israel)

Published in SPIE Proceedings Vol. 6619:
Third European Workshop on Optical Fibre Sensors
Antonello Cutolo; Brian Culshaw; José Miguel López-Higuera, Editor(s)

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