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

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationFifth European Workshop on Optical Fibre Sensors
DOIs
Publication statusPublished - Sep 24 2013
Externally publishedYes
Event5th European Workshop on Optical Fibre Sensors, EWOFS 2013 - Krakow, Poland
Duration: May 19 2013May 22 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8794
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

Other5th European Workshop on Optical Fibre Sensors, EWOFS 2013
CountryPoland
CityKrakow
Period5/19/135/22/13

Keywords

  • FBG sensor
  • FPI sensor
  • Fabry-Perot interferometer (FPI)
  • Fiber Bragg grating (FBG)
  • Fiber optic pressure sensor (FOPS)
  • Medical sensor
  • Optical fiber sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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