Passive temperature compensation package for fiber Bragg grating

Weiping Yan; Zixue Guo; Cong Wang; Yushu Zhang; Guotong Du

doi:10.1117/12.676531

23 February 2006 Passive temperature compensation package for fiber Bragg grating

Weiping Yan, Zixue Guo, Cong Wang, Yushu Zhang, Guotong Du

Proceedings Volume 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 615046 (2006) https://doi.org/10.1117/12.676531
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

Abstract

The reflecting wavelength shift of fiber Bragg grating (FBG) can be caused by the variations of both strain and temperature, and such a so-called cross sensitivity is a "bottle-neck" which limits the FBG sensing and measuring technique to put into practical application. The measurement error is caused by the temperature change to measure the strain-inducing Bragg wavelength shift. The basic theory of temperature compensation of fiber Bragg gratings is presented according to the physical mechanisms of the strain and temperature cross sensitivity. A passive compact package for compensating the temperature dependence of FBG, based on the use of two materials with different thermal expansion coefficients, has been demonstrated. Two ends of the tensioned fiber grating are attached to the organic glass with epoxy resin. As the temperature rises and the strain is progressively released, it compensates the temperature dependence of the Bragg wavelength. The relation between temperature and wavelength in different compensation condition and in different strain is given. And the reason of undercompensation or overcompensation of the FBG is also analyzed. The Bragg wavelength shift over the temperature range of -19°C to 60°C is 0.79 nm for the uncompensated FBG, and that of the compensated FBG is only 0.035 nm for uncompensated FBG, which is 1/22 of that of the uncompensated FBG.

Citation Download Citation

Weiping Yan, Zixue Guo, Cong Wang, Yushu Zhang, and Guotong Du "Passive temperature compensation package for fiber Bragg grating", Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 615046 (23 February 2006); https://doi.org/10.1117/12.676531

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