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Miniature temperature-insensitive Fabry-Pe/spl acute/rot fiber-optic pressure sensor

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5 Author(s)
Juncheng Xu ; Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., USA ; Xingwei Wang ; K. L. Cooper ; G. R. Pickrell
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We present a miniature fiber-optic pressure sensor with a diameter of only 125 mum. The sensor works as an extrinsic Fabry-Peacuterot interferometer and the cavity length can be controlled with a resolution of about several nanometers. Also the sensor sensitivity can be easily adjusted by controlling the sensor gauge length. A passive temperature compensation scheme was used to reduce most of the sensor's temperature dependence. Since the sensor is composed entirely of fused silica, it is reliable, biocompatible, corrosion resistant, and immune to electromagnetic interference and has high-temperature capability

Published in:

IEEE Photonics Technology Letters  (Volume:18 ,  Issue: 10 )