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

Chia-Min Lin; Wen-Fung Liu; Ming-Yue Fu; Hao-Jan Sheng; Sheau-Shung Bor; Chuen-Lin Tien

doi:10.1117/12.567643

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14 December 2004 A simultaneous pressure and temperature sensor based on a superstructure fiber grating

Chia-Min Lin, Wen-Fung Liu, Ming-Yue Fu, Hao-Jan Sheng, Sheau-Shung Bor, Chuen-Lin Tien

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Proceedings Volume 5589, Fiber Optic Sensor Technology and Applications III; (2004) https://doi.org/10.1117/12.567643
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

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.

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Chia-Min Lin, Wen-Fung Liu, Ming-Yue Fu, Hao-Jan Sheng, Sheau-Shung Bor, and Chuen-Lin Tien "A simultaneous pressure and temperature sensor based on a superstructure fiber grating", Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, (14 December 2004); https://doi.org/10.1117/12.567643

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