Next Article in Journal
Water Quality Monitoring in Developing Countries; Can Microbial Fuel Cells be the Answer?
Next Article in Special Issue
Optical Microfibre Based Photonic Components and Their Applications in Label-Free Biosensing
Previous Article in Journal
Aluminum Nanoholes for Optical Biosensing
Article Menu

Export Article

Open AccessArticle
Biosensors 2015, 5(3), 432-449; doi:10.3390/bios5030432

Recent Improvement of Medical Optical Fibre Pressure and Temperature Sensors

1
Optical Fibre Sensors Research Centre-University of Limerick, Limerick MS1019, Ireland
2
Nanophotonics Research Laboratory, Cyprus University of Technology, Lemesos 3036, Cyprus
3
University of Limerick, Chemical & Environmental Science, Limerick MS1019, Ireland
*
Author to whom correspondence should be addressed.
Academic Editor: Yuliya Semenova
Received: 4 June 2015 / Revised: 1 July 2015 / Accepted: 2 July 2015 / Published: 13 July 2015
(This article belongs to the Special Issue Optical Sensors for Biomedical Applications)

Abstract

This investigation describes a detailed analysis of the fabrication and testing of optical fibre pressure and temperature sensors (OFPTS). The optical sensor of this research is based on an extrinsic Fabry–Perot interferometer (EFPI) with integrated fibre Bragg grating (FBG) for simultaneous pressure and temperature measurements. The sensor is fabricated exclusively in glass and with a small diameter of 0.2 mm, making it suitable for volume-restricted bio-medical applications. Diaphragm shrinking techniques based on polishing, hydrofluoric (HF) acid and femtosecond (FS) laser micro-machining are described and analysed. The presented sensors were examined carefully and demonstrated a pressure sensitivity in the range of \(s_p\) = 2–10 \(\frac{\text{nm}}{\text{kPa}}\) and a resolution of better than \(\Delta P\) = 10 Pa protect (0.1 cm H\(_2\)O). A static pressure test in 38 cmH\(_2\)O shows no drift of the sensor in a six-day period. Additionally, a dynamic pressure analysis demonstrated that the OFPTS never exceeded a drift of more than 130 Pa (1.3 cm H\(_2\)O) in a 12-h measurement, carried out in a cardiovascular simulator. The temperature sensitivity is given by \(k=10.7\) \(\frac{\text{pm}}{\text{K}}\), which results in a temperature resolution of better than \(\Delta T\) = 0.1 K. Since the temperature sensing element is placed close to the pressure sensing element, the pressure sensor is insensitive to temperature changes. View Full-Text
Keywords: optical fibre sensors; Fabry–Perot interferometer; pressure sensors optical fibre sensors; Fabry–Perot interferometer; pressure sensors
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Poeggel, S.; Duraibabu, D.; Kalli, K.; Leen, G.; Dooly, G.; Lewis, E.; Kelly, J.; Munroe, M. Recent Improvement of Medical Optical Fibre Pressure and Temperature Sensors. Biosensors 2015, 5, 432-449.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Biosensors EISSN 2079-6374 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top