High performance interrogation of ultra-weak FBG array using double-pulse and heterodyne coherent detection

Feng Wang*, Tao Liu, Quan Yuan, Yu Liu, Jihui Niu, Xuping Zhang, Lin Zhang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A high performance interrogation method for ultra-weak FBG (UWFBG) is proposed by using double-pulse and heterodyne coherent detection method. The disturbance of fiber is detected by resolving the phase of the heterodyne coherent signal. The double-pulse helps to locate the disturbance. With a differential method for the signals between different UWFBG pairs, the disturbance can be resolved precisely. In experiment, sinusoidal disturbance and triangle disturbance are demodulated quantitatively. The sensing frequency can be as low as 0.2Hz.

Original languageEnglish
Title of host publication2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017
PublisherIEEE
Pages1-3
Number of pages3
ISBN (Electronic)9781509062904
DOIs
Publication statusPublished - 22 Nov 2017
Event2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017 - Singapore, Singapore
Duration: 31 Jul 20174 Aug 2017

Conference

Conference2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017
CountrySingapore
CitySingapore
Period31/07/174/08/17

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Keywords

  • Dynamic vibration measurement
  • Optical fiber interference
  • Optical fiber sensors
  • Optical time domain reflectometry
  • Ultra-weak FBG

Cite this

Wang, F., Liu, T., Yuan, Q., Liu, Y., Niu, J., Zhang, X., & Zhang, L. (2017). High performance interrogation of ultra-weak FBG array using double-pulse and heterodyne coherent detection. In 2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017 (pp. 1-3). IEEE. https://doi.org/10.1109/CLEOPR.2017.8118635