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
Yunmiao Wang, Jianmin Gong, Bo Dong, Dorothy Y. Wang, Tyler J. Shillig, and Anbo Wang, "A Large Serial Time-Division Multiplexed Fiber Bragg Grating Sensor Network," J. Lightwave Technol. 30, 2751-2756 (2012)