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8 April 2008 Performance of the fiber Bragg grating sensors at cryogenic temperatures
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The strain and temperature sensing performance of FBG are studied in the temperature range of 123K to 273K by the experiment. The temperature sensitive, strain coefficient and cross-sensitivity coefficient of the sensors are derived analytically and verified by experiments. It is found that they are nonlinear. Cross sensitivity increase with lower temperature. At a constant temperature, the Bragg wavelength shift is linear with the longitudinal strain within the range of 5000 micro strains.
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Zhan-Sheng Guo, Junqian Zhang, Xingming Guo, and Hongjiu Hu "Performance of the fiber Bragg grating sensors at cryogenic temperatures", Proc. SPIE 6932, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2008, 69322N (8 April 2008);

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