Abstract
We demonstrated a wavelength scanning time division multiplexing of 1000
ultra-weak fiber Bragg gratings (FBG) for distributed temperature sensing. The strong
multiplexing capability and low crosstalk of the ultra-weak FBG sensors is investigated
through both theoretical analysis and experiment. An automated FBG fabrication system
was developed for fast 1000-FBG fabrication. The measurement accuracy of Bragg
wavelengths for more than 80% FBGs is less than 20 pm, corresponding to 2 °C in
temperature.
© 2012 IEEE
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