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8 September 2010Feedback controlled single wavelength interrogation technique for miniature all-silica EFPI fibre optic pressure sensors
This paper proposes a novel technique to stabilise the output wavelength of a tuneable laser source to operate always in
the linear range of a miniature all-silica Extrinsic Fabry-Perot Interferometric (EFPI) fibre optic pressure sensor. The
technique is based on a fibre optic hybrid sensor, which consists of a miniature all-silica EFPI fibre optic pressure sensor
with an incorporated in-Fibre Bragg Grating (FBG). The FBG temperature reference sensor is used as a feedback
element to stabilise the output wavelength of a tuneable laser source. Therefore the novel interrogation technique allows
high speed pressure measurements in high temperature environments.
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K. Bremer, E. Lewis, G. Leen, B. Moss, S. Lochmann, I. Mueller, "Feedback controlled single wavelength interrogation technique for miniature all-silica EFPI fibre optic pressure sensors," Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76532D (8 September 2010); https://doi.org/10.1117/12.866451