Improvement of signal-to-noise-ratio by combining Walsh and Golay codes in modulating the pump light of phase-shift pulse BOTDA fiber sensor

Mohd Saiful Dzulkefly Zan, Ahmad Ashrif A Bakar, Tsuneo Horiguchi

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

6 Citations (Scopus)

Abstract

We report in this paper the simultaneous employment of two different coding techniques called Walsh code and Golay code for modulating the pump light of Brillouin optical time domain analysis (BOTDA) fiber optic sensor. In this technique, the elements of Walsh code are nested within each element of Golay code and vice versa. The technique also modulates the pump with the non-return-to-zero (NRZ) and return-to-zero (RZ) formats for the inner and outer codes, respectively. Experimental findings have revealed that the proposed coding technique contributed to higher signal-to-noise improvement ratio (SNIR), compared to that of using only one kind of code; we obtained the maximum optical SNIR of about 6 dB. We have also successfully demonstrated 10 cm of high spatial resolution measurement with the use of 1 ns of coded pulse duration.

Original languageEnglish
Title of host publication2015 9th International Conference on Sensing Technology, ICST 2015
PublisherIEEE Computer Society
Pages269-273
Number of pages5
Volume2016-March
ISBN (Electronic)9781479963140
DOIs
Publication statusPublished - 2016 Mar 21
Event9th International Conference on Sensing Technology, ICST 2015 - Auckland, New Zealand
Duration: 2015 Dec 82015 Dec 11

Other

Other9th International Conference on Sensing Technology, ICST 2015
CountryNew Zealand
CityAuckland
Period15/12/815/12/11

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Keywords

  • Brillouin frequency shift (BFS)
  • Brillouin optical time domain analysis (BOTDA)
  • combined codes
  • fiber sensor
  • stimulated Brillouin scattering (SBS)

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Science Applications
  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

Zan, M. S. D., Bakar, A. A. A., & Horiguchi, T. (2016). Improvement of signal-to-noise-ratio by combining Walsh and Golay codes in modulating the pump light of phase-shift pulse BOTDA fiber sensor. In 2015 9th International Conference on Sensing Technology, ICST 2015 (Vol. 2016-March, pp. 269-273). [7438405] IEEE Computer Society. https://doi.org/10.1109/ICSensT.2015.7438405