Improving the peak wavelength detection accuracy of Sn-doped, H-2-loaded FBG high temperature sensors by wavelet filter and Gaussian curve fitting

[摘要]：Fiber Bragg grating (FBG) written into Sn-doped, H-2-loaded fiber could be used as high-temperature sensors up to 800 degrees C, but the peak wavelength detecting accuracy was unsatisfactory due to the low signal-noise ratio (SNR) and spectrum distortion.

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