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Article

Dynamic Characterisation of Fibre-Optic Temperature Sensors for Physiological Monitoring

1
Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E 6BT, UK
2
Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, Charles Bell House, 43–45 Foley Street, London W1W 7TY, UK
3
Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
*
Author to whom correspondence should be addressed.
Sensors 2021, 21(1), 221; https://doi.org/10.3390/s21010221
Received: 5 November 2020 / Revised: 21 December 2020 / Accepted: 24 December 2020 / Published: 31 December 2020
(This article belongs to the Section Optical Sensors)
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. View Full-Text
Keywords: temperature sensors; fibre-optic sensors; dynamic response; time constant; minimally invasive surgery; physiological monitoring; interventional devices temperature sensors; fibre-optic sensors; dynamic response; time constant; minimally invasive surgery; physiological monitoring; interventional devices
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MDPI and ACS Style

Coote, J.M.; Torii, R.; Desjardins, A.E. Dynamic Characterisation of Fibre-Optic Temperature Sensors for Physiological Monitoring. Sensors 2021, 21, 221. https://doi.org/10.3390/s21010221

AMA Style

Coote JM, Torii R, Desjardins AE. Dynamic Characterisation of Fibre-Optic Temperature Sensors for Physiological Monitoring. Sensors. 2021; 21(1):221. https://doi.org/10.3390/s21010221

Chicago/Turabian Style

Coote, Joanna M., Ryo Torii, and Adrien E. Desjardins 2021. "Dynamic Characterisation of Fibre-Optic Temperature Sensors for Physiological Monitoring" Sensors 21, no. 1: 221. https://doi.org/10.3390/s21010221

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