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Proceedings Paper

A simultaneous pressure and temperature sensor based on a superstructure fiber grating
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Paper Abstract

We demonstrated that a high-sensitivity fiber sensor based on a superstructure fiber grating (SFG) can simultaneously measure the pressure and temperature by encapsulating the grating in a polymer-half-filled metal cylinder, in which there are two openings on opposite sides of the wall filled with the polymer to sense the pressure. The mechanism of sensing pressure is to transfer the pressure into the axial extended-strain. According to the optical characteristics of an SFG composed of a fiber Bragg grating (FBG) and long period grating (LPG), the various pressure and temperature will cause the variation of the center-wavelength and reflection simultaneously. Thus, the sensor can be used for the measurement both of the pressure and temperature. The pressure sensitivity of 2.28×10-2MPa-1 and the temperature sensitivity both of 0.015nm/°C and -0.143dB/°C are obtained.

Paper Details

Date Published: 14 December 2004
PDF: 8 pages
Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, (14 December 2004); doi: 10.1117/12.567643
Show Author Affiliations
Chia-Min Lin, Feng-Chia Univ. (Taiwan)
Wen-Fung Liu, Feng-Chia Univ. (Taiwan)
Ming-Yue Fu, National Defense Univ. (Taiwan)
Hao-Jan Sheng, Feng-Chia Univ. (Taiwan)
Sheau-Shung Bor, Feng-Chia Univ. (Taiwan)
Chuen-Lin Tien, Feng-Chia Univ. (Taiwan)

Published in SPIE Proceedings Vol. 5589:
Fiber Optic Sensor Technology and Applications III
Michael A. Marcus; Brian Culshaw; John P. Dakin, Editor(s)

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