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25 September 1995 Applications of the extrinsic Fabry-Perot interferometer
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Proceedings Volume 2510, Fiber Optic and Laser Sensors XIII; (1995)
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany
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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jonathan A. Greene, Tuan A. Tran, Kent A. Murphy, Michael F. Gunther, Russell G. May, and Richard O. Claus "Applications of the extrinsic Fabry-Perot interferometer", Proc. SPIE 2510, Fiber Optic and Laser Sensors XIII, (25 September 1995);

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