Unsteady gas temperature measurement using an ultra-short optical fibre Fabry-Perot interferometer

Steve Kidd, J. S. Barton, M. N. Inci, J. D C Jones

Research output: Contribution to journalArticle

Abstract

A sensor for high-frequency measurement of gas temperature has been developed: the sensing element is a very short length (40 µm) optical fibre Fabry-Perot interferometer, fabricated using a technique based on fusion of optical fibres coated with titanium dioxide to form partially reflective splices. The interferometer is thermally sensitive and small in size. Thermal response is demonstrated experimentally to 3 kHz in vortex shedding from a heated wire in air flow. The observed sensitivity is in agreement with heat transfer and aerodynamic modelling of the sensor and with the thermo-optic coefficient of the fibre core.

Original languageEnglish
Pages (from-to)816-822
Number of pages7
JournalMeasurement Science and Technology
Volume5
Issue number7
DOIs
Publication statusPublished - Jul 1994

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