Displacement sensor based on optical fibre with multiple overlapping imperfections

Eli Vilge; Moshe Levantovsky; Yoel Arieli; Hans Poisel; Anatoly Babchenko

doi:10.1117/12.738355

2 July 2007 Displacement sensor based on optical fibre with multiple overlapping imperfections

Eli Vilge, Moshe Levantovsky, Yoel Arieli, Hans Poisel, Anatoly Babchenko

Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66190R (2007) https://doi.org/10.1117/12.738355
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

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.

Citation Download Citation

Eli Vilge, Moshe Levantovsky, Yoel Arieli, Hans Poisel, and Anatoly Babchenko "Displacement sensor based on optical fibre with multiple overlapping imperfections", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66190R (2 July 2007); https://doi.org/10.1117/12.738355

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KEYWORDS

Sensors

Optical fibers

Fiber optics sensors

Phase only filters

Polymers

Fiber optics

Structured optical fibers

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