Fiber optic Fabry-Perot sensors for high-speed heat transfer measurements

Stephen R. Kidd; Pranay G. Sinha; James S. Barton; Julian D. C. Jones

doi:10.1117/12.46983

1 September 1991 Fiber optic Fabry-Perot sensors for high-speed heat transfer measurements

Stephen R. Kidd, Pranay G. Sinha, James S. Barton, Julian D. C. Jones

Author Affiliations +

Proceedings Volume 1504, Fiber-Optic Metrology and Standards; (1991) https://doi.org/10.1117/12.46983
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

Abstract

The design, construction, operation, and preliminary evaluation of miniature fiber Fabry-Perot (FFP) interferometers used as heat transfer gauges is described. These gauges are being developed for a particular application where heat transfer data is currently obtained using conventional platinum thin-film resistance thermometers. The specifications that the sensors must exceed are: (1) temperature resolution of 25 mK over a 50 K range; (2) temporal response of 10 microsecond(s) ; (3) an ability to operate as a calorimetric heat-transfer gauge. The sensor consists of a short length of single-mode optical fiber (approximately equals 3 mm) to which low- reflectivity coatings have been applied at each end. It is illuminated and interrogated by an arbitrary length of addressing fiber. A laser diode is used as the source and the authors have exploited the facility to frequency modulate the diode in a novel signal processing scheme. To determine the performance of the sensor, short duration heat pulses derived from a pulsed Nd:YAG laser were applied to one end of the FFP. The response time was found to be 8 microsecond(s) and the sensor operation as a calorimeter was verified.

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Stephen R. Kidd, Pranay G. Sinha, James S. Barton, and Julian D. C. Jones "Fiber optic Fabry-Perot sensors for high-speed heat transfer measurements", Proc. SPIE 1504, Fiber-Optic Metrology and Standards, (1 September 1991); https://doi.org/10.1117/12.46983

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