Journal
OPTICAL ENGINEERING
Volume 53, Issue 6, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.53.6.067101
Keywords
intrinsic Fabry-Perot interferometer; extrinsic Fabry-Perot interferometer; temperature; pressure; fiber optic sensor
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Funding
- Department of Energy (DOE)-National Energy Technology Laboratory (NETL) [DE-FE0001127]
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This paper presents an approach for simultaneous measurement of temperature and pressure using miniaturized fiber inline sensors. The approach utilizes the cascaded optical fiber inline intrinsic Fabry-Perot interferometer and extrinsic Fabry-Perot interferometer as temperature and pressure sensing elements, respectively. A CO2 laser was used to create a loss between them to balance their reflection power levels. The multiplexed signals were demodulated using a Fast Fourier transform-based wavelength tracking method. Experimental results showed that the sensing system could measure temperature and pressure unambiguously in a pressure range of 0 to 6.895 x 10(5) Pa and a temperature range from 20 degrees C to 700 degrees C. (c) The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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