Investigation and development of a fibre optic temperature sensor for monitoring liquid temperature in a high-power microwave environment

Mary McSherry; Colin Fitzpatrick; Elfed Lewis

doi:10.1117/12.566595

9 June 2004 Investigation and development of a fibre optic temperature sensor for monitoring liquid temperature in a high-power microwave environment

Mary McSherry, Colin Fitzpatrick, Elfed Lewis

Author Affiliations +

Proceedings Volume 5502, Second European Workshop on Optical Fibre Sensors; (2004) https://doi.org/10.1117/12.566595
Event: Second European Workshop on Optical Fibre Sensors, 2004, Santander, Spain

Abstract

An extrinsic optical fiber temperature sensor has been investigated and results are presented. A coating consists of a combination of two inorganic phosphors. Thermal quenching dominates the luminescent characteristics of one phosphor at temperatures in the range of interest while the other more stable phosphor is used as a reference. Ratios of their peak emission intensities are calculated and analyzed. The phosphor mixture is coated onto a Pyrex beaker. Boiling water is poured into beaker and the ratio is calculated as the temperature of the water descreases from 80°C to 30°C. Results show an increasing ratio for decreasing temperature. This paper describes the testing of the coating and its application, as part of a temperature sensor, for monitoring surface temperatures in electromagnetically harsh industrial environments.

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Mary McSherry, Colin Fitzpatrick, and Elfed Lewis "Investigation and development of a fibre optic temperature sensor for monitoring liquid temperature in a high-power microwave environment", Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); https://doi.org/10.1117/12.566595

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