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Dynamic Characterisation of Fibre-Optic Temperature Sensors for Physiological Monitoring

Coote, JM; Torii, R; Desjardins, AE; (2021) Dynamic Characterisation of Fibre-Optic Temperature Sensors for Physiological Monitoring. Sensors , 21 (1) , Article 221. 10.3390/s21010221. Green open access

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Abstract

Fast, miniature temperature sensors are required for various biomedical applications. Fibre-optics are particularly suited to minimally invasive procedures, and many types of fibre-optic temperature sensors have been demonstrated. In applications where rapidly varying temperatures are present, a fast and well-known response time is important; however, in many cases, the dynamic behaviour of the sensor is not well-known. In this article, we investigate the dynamic response of a polymer-based interferometric temperature sensor, using both an experimental technique employing optical heating with a pulsed laser, and a computational heat transfer model based on the finite element method. Our results show that the sensor has a time constant on the order of milliseconds and a −6 dB bandwidth of up to 178 Hz, indicating its suitability for applications such as flow measurement by thermal techniques, photothermal spectroscopy, and monitoring of thermal treatments.

Type: Article
Title: Dynamic Characterisation of Fibre-Optic Temperature Sensors for Physiological Monitoring
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/s21010221
Publisher version: https://doi.org/10.3390/s21010221
Language: English
Additional information: 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 https://creativecommons.org/licenses/by/4.0/
Keywords: temperature sensors; fibre-optic sensors; dynamic response; time constant; minimally invasive surgery; physiological monitoring; interventional devices
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10118733
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