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Proceedings Paper

State of the art in high-temperature fiber optic sensors
Author(s): Robert S. Fielder; Kelly L. Stinson-Bagby; Matthew E. Palmer
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Paper Abstract

The objective of the work presented was to develop a suite of sensors for use in high-temperature aerospace environments, including turbine engine monitoring, hypersonic vehicle skin friction measurements, and support ground and flight test operations. A fiber optic sensor platform was used to construct the sensor suite. Successful laboratory demonstrations include calibration of pressure sensors to 500psi at a gas temperature of 800°C. Additionally, pressure sensors were demonstrated at 800°C in combination with a high-speed (1.0MHz) fiber optic readout system enabling previously unobtainable dynamic measurements at high-temperatures. Temperature sensors have been field tested up to 1400°C and as low as -195°C. The key advancement that enabled the operation of these novel harsh environment sensors was a fiber optic packaging methodology that allowed the coupling of alumina and sapphire transducer components, optical fiber, and high-temperature alloy housing materials. The basic operation of the sensors and early experimental results are presented. Each of the sensors described here represent a quantifiable advancement in the state of the art in high-temperature physical sensors and will have a significant impact on the aerospace propulsion instrumentation industry.

Paper Details

Date Published: 14 December 2004
PDF: 10 pages
Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, (14 December 2004); doi: 10.1117/12.583341
Show Author Affiliations
Robert S. Fielder, Luna Innovations, Inc. (United States)
Kelly L. Stinson-Bagby, Luna Innovations, Inc. (United States)
Matthew E. Palmer, Luna Innovations, Inc. (United States)

Published in SPIE Proceedings Vol. 5589:
Fiber Optic Sensor Technology and Applications III
Michael A. Marcus; Brian Culshaw; John P. Dakin, Editor(s)

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