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Proceedings Paper

Applications of the extrinsic Fabry-Perot interferometer
Author(s): Jonathan A. Greene; Tuan A. Tran; Kent A. Murphy; Michael F. Gunther; Russell G. May; Richard O. Claus
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Paper Abstract

We discuss two of the latest demonstrations of the extrinsic Fabry-Perot interferometer (EFPI) sensor, namely a novel silica fiber-based hydrogen sensor and a high-temperature, sapphire fiber-based displacement sensor for surface strain measurements at temperatures up to 2000 degrees C. To modify the EFPI sensor for the detection of hydrogen, the sensor is sputter coated with a 2 micrometers layer of palladium. Based on the signal-to-noise ratio of the sensor, a minimum detectable hydrogen concentration of 35 ppm has been obtained. For displacement measurements at temperatures above the melting point of silica, we discuss results using a sapphire fiber EFPI sensing head demodulated using white light scanning Michelson interferometer.

Paper Details

Date Published: 25 September 1995
PDF: 7 pages
Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995); doi: 10.1117/12.221697
Show Author Affiliations
Jonathan A. Greene, Fiber and Sensor Technologies, Inc. (United States)
Tuan A. Tran, Fiber and Sensor Technologies, Inc. (United States)
Kent A. Murphy, Virginia Polytechnic Institute and State Univ. (United States)
Michael F. Gunther, Virginia Polytechnic Institute and State Univ. (United States)
Russell G. May, Virginia Polytechnic Institute and State Univ. (United States)
Richard O. Claus, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 2510:
Fiber Optic and Laser Sensors XIII
Ramon P. DePaula; John W. Berthold, Editor(s)

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