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

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6 Author(s)
Yunmiao Wang ; Center for Photonics Technology, Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA ; Jianmin Gong ; Bo Dong ; Dorothy Y. Wang
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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 ^{\circ} C in temperature.

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Journal of Lightwave Technology  (Volume:30 ,  Issue: 17 )