Differential Cross Spectrum Technique for Improving the Spatial Resolution of BOTDR Sensor

Mohd Saiful Dzulkefly Zan, Yuki Masui, Tsuneo Horiguchi

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

2 Citations (Scopus)

Abstract

We propose a technique in BOTDR fiber sensor to generate a pair of pulsed probes via intensity modulation scheme for measuring distributed strain at high spatial resolution. The first probe consists of a long-and short duration of pulses separated by a short interval. The second probe only has the long pulse of the first probe. Introducing FFT in correlating the backscattered signals sampled by wide and narrow window functions for each probe gives narrow Brillouin spectrum width. The subtraction of the correlated signals obtained by the two probes results in high spatial resolution measurement. The intensity modulation makes it easier to generate the pair of pulsed probes having the same waveform of the long pulse and to obtain the results according to the measurement principle. We have achieved 0.2 m spatial resolution and 3.2 MHz Brillouin frequency accuracy in measuring a 350 m fiber.

Original languageEnglish
Title of host publication2018 IEEE 7th International Conference on Photonics, ICP 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538611876
DOIs
Publication statusPublished - 2018 Nov 12
Event7th IEEE International Conference on Photonics, ICP 2018 - Langkawi, Kedah, Malaysia
Duration: 2018 Apr 92018 Apr 11

Other

Other7th IEEE International Conference on Photonics, ICP 2018
CountryMalaysia
CityLangkawi, Kedah
Period18/4/918/4/11

Keywords

  • BOTDR
  • Brillouin frequency shift
  • Distributed fiber sensor

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

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  • Cite this

    Zan, M. S. D., Masui, Y., & Horiguchi, T. (2018). Differential Cross Spectrum Technique for Improving the Spatial Resolution of BOTDR Sensor. In 2018 IEEE 7th International Conference on Photonics, ICP 2018 [8533208] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICP.2018.8533208