Fiber optic extrinsic FPI/FBG sensor for temperature-compensated pressure measurement in medical applications

S. Poeggel; D. Tosi; G. Leen; E. Lewis

doi:10.1117/12.2025483

20 May 2013 Fiber optic extrinsic FPI/FBG sensor for temperature-compensated pressure measurement in medical applications

S. Poeggel, D. Tosi, G. Leen, E. Lewis

Author Affiliations +

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87940J (2013) https://doi.org/10.1117/12.2025483
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

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.

Citation Download Citation

S. Poeggel, D. Tosi, G. Leen, and E. Lewis "Fiber optic extrinsic FPI/FBG sensor for temperature-compensated pressure measurement in medical applications", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87940J (20 May 2013); https://doi.org/10.1117/12.2025483

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