Novel temperature compensation techniques for fiber Bragg gratings-based magnetostrictive sensors

Benshun Yi; Beatrice C.B. Chu; Man Leong Mok; Zhihao Chen; Kin Seng Chiang

doi:10.1117/12.369352

11 November 1999 Novel temperature compensation techniques for fiber Bragg gratings-based magnetostrictive sensors

Benshun Yi, Beatrice C.B. Chu, Man Leong Mok, Zhihao Chen, Kin Seng Chiang

Proceedings Volume 3897, Advanced Photonic Sensors and Applications; (1999) https://doi.org/10.1117/12.369352
Event: International Symposium on Photonics and Applications, 1999, Singapore, Singapore

Abstract

Two simple techniques for the compensation of the temperature effects in fiber Bragg grating (FBG) based magnetostrictive sensors are demonstrated, where two FBGs are arranged in such a way that the magnetostrictive effects on the two gratings are added together, while the temperature effects are cancelled out. The two FBGs can be bonded in perpendicular to each other onto the surface of a magnetostrictive plate, or onto the surface of two different magnetostrictive bars that possess close thermal expansion coefficients but magnetostrictive coefficients of opposite signs. In both cases, the Bragg wavelength difference between the two gratings is insensitive to the temperature and measures the sum of the magnetostrictive effects experienced by the two FBGs. Using these techniques, we have been able to reduce the temperature sensitivity of the sensor by more than 10 times.

Citation Download Citation

Benshun Yi, Beatrice C.B. Chu, Man Leong Mok, Zhihao Chen, and Kin Seng Chiang "Novel temperature compensation techniques for fiber Bragg gratings-based magnetostrictive sensors", Proc. SPIE 3897, Advanced Photonic Sensors and Applications, (11 November 1999); https://doi.org/10.1117/12.369352

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