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Proceedings Paper

High temperature sensor based on an in-fibre Fabry-Perot cavity
Author(s): Oliver Schneller; Jinesh Mathew; William N. MacPherson; Robert R. J. Maier
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Paper Abstract

We present the fabrication, characterization and encapsulation of a fibre optic temperature sensor based upon a micro Fabry-Perot (F-P) cavity. The F-P cavity is formed between a reflective in-fibre metallic splice and the air-fibre boundary at the end of the sensor. A change in temperature modifies the optical cavity length and this is observed as a shift in the reflected interference spectrum. The temperature resolution of the sensor is <10 °C. The sensor can reliably operate for high temperature measurement up to 1000 °C. Furthermore a sealed off capillary is used to avoid strain transfer to the sensor in embedded applications.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91578L (2 June 2014); doi: 10.1117/12.2059651
Show Author Affiliations
Oliver Schneller, Heriot-Watt Univ. (United Kingdom)
Hochschule für Angewandte Wissenschaften München (Germany)
Jinesh Mathew, Heriot-Watt Univ. (United Kingdom)
William N. MacPherson, Heriot-Watt Univ. (United Kingdom)
Robert R. J. Maier, Heriot-Watt Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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