The use of Walsh functions in modulating pump light of high-spatial- resolution BOTDA with NRZ pulses

Mohd Saiful Dzulkefly Bin Zan, Tatsuya Tsumuraya, Tsuneo Horiguchi

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

2 Citations (Scopus)

Abstract

We have previously introduced phase modulation into pulsed pump of Brillouin Optical Time Domain Analysis (BOTDA) in order to obtain high spatial resolution. In this study, we propose to use Walsh functions in coding nonreturn-to-zero (NRZ) formatted pump pulses of the high-spatial-resolution BOTDA to increase signal-to-noise ratio (SNR). Contrary to previous reports, it is numerically and experimentally verified that the use of the Walsh functions in the high-spatial-resolution BOTDA allows the increase in SNR without deteriorating its spatial resolution expected. We demonstrate measurements with 1.5 dB improvement in SNR and with approximately 0.2 m spatial resolution.

Original languageEnglish
Title of host publication22nd International Conference on Optical Fiber Sensors
DOIs
Publication statusPublished - 2012 Dec 1
Event22nd International Conference on Optical Fiber Sensors - Beijing, China
Duration: 2012 Oct 152012 Oct 19

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8421
ISSN (Print)0277-786X

Conference

Conference22nd International Conference on Optical Fiber Sensors
CountryChina
CityBeijing
Period12/10/1512/10/19

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Keywords

  • BOTD1 fiber sensor
  • Brillouin frequency shift
  • Stimulated Brillouin scattering (SBS)
  • Walsh functions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Bin Zan, M. S. D., Tsumuraya, T., & Horiguchi, T. (2012). The use of Walsh functions in modulating pump light of high-spatial- resolution BOTDA with NRZ pulses. In 22nd International Conference on Optical Fiber Sensors [84219J] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8421). https://doi.org/10.1117/12.968584