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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 30,
  • Issue 17,
  • pp. 2751-2756
  • (2012)

A Large Serial Time-Division Multiplexed Fiber Bragg Grating Sensor Network

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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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