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2 February 2009Novel FBG temperature sensor eliminating lateral strain cross-sensitivity
The novel FBG temperature sensor eliminating lateral strain cross-sensitivity was present and theoretically analyzed. The
temperature sensor characteristic of the FBG based on the method for eliminating lateral strain was researched from
room temperature to 190°C, and the FBG was pressed by lateral force during rising temperature. The lateral force
resulted in the birefringence of the FBG, and the FBG exited two different reflective spectra meeting with the Bragg
condition. The change spacing of the peak value between two reflective spectra is used to eliminate lateral strain crosssensitivity
to temperature, and amend the temperature sensitivity coefficient and the change temperature value.