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Multiplexed Fiber Fabry–Pérot Interferometer Sensors Based on Ultrashort Bragg Gratings

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5 Author(s)
Zhuang Wang ; Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ. ; Fabin Shen ; Lijun Song ; Xingwei Wang
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This letter reports a fiber Fabry-Peacuterot interferometer sensor formed by two closely spaced ultrashort uniform Bragg gratings within fiber core. The sensor has insertion loss as low as 0.002 dB which enables a considerable increase in the sensor's multiplexing capability. Fifty sensors are experimentally multiplexed along a single fiber using a frequency-division-multiplexing method. The potential of multiplexing more than 500 sensors is theoretically expected. The sensor's application in temperature and strain measurement is also investigated

Published in:

Photonics Technology Letters, IEEE  (Volume:19 ,  Issue: 8 )