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Proceedings Paper

Fiber optic extrinsic FPI/FBG sensor for temperature-compensated pressure measurement in medical applications
Author(s): S. Poeggel; D. Tosi; G. Leen; E. Lewis
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Paper Abstract

A combined optical fiber pressure/temperature sensing system based on low-finesse extrinsic Fabry-Perot interferometer (EFPI) in conjunction with a fiber Bragg grating (FBG) for biomedical measurement applications is presented. The sensing probe has 200 μm outer diameter, and is biocompatible, meeting the requirements for the most demanding biomedical applications. High accuracy (<1mmHg) is achieved by means of fiber polishing and diaphragm etching in hydrofluoric acid, and optimizing the sensitivity to <1nm/kPa. A white light interrogation system based on spectrometric analysis has been developed which implements several pressure detection algorithms. A measurement campaign has been carried out to validate the proposed system, showing 1mmHg accuracy, air-gap compression linearity, and temperature compensation.

Paper Details

Date Published: 20 May 2013
PDF: 6 pages
Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87940J (20 May 2013); doi: 10.1117/12.2025483
Show Author Affiliations
S. Poeggel, Univ. of Limerick (Ireland)
D. Tosi, Univ. of Limerick (Ireland)
G. Leen, Univ. of Limerick (Ireland)
E. Lewis, Univ. of Limerick (Ireland)

Published in SPIE Proceedings Vol. 8794:
Fifth European Workshop on Optical Fibre Sensors
Leszek R. Jaroszewicz, Editor(s)

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