The use of Walsh code in modulating the pump light of high spatial resolution phase-shift-pulse Brillouin optical time domain analysis with non-return-to-zero pulses

Mohd Saiful Dzulkefly Bin Zan, Tatsuya Tsumuraya, Tsuneo Horiguchi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We have previously reported phase modulation of pump light of phase-shift pulse Brillouin optical time domain analysis with non-return-to-zero (NRZ)-formatted Golay codes. However, the Brillouin signal has been distorted when the duration of the coded pulse used exceeds the time constant of the amplitude in the acoustic wave that causes stimulated Brillouin scattering. Therefore, we propose pump modulation with Walsh codes to overcome this problem. We have shown that the use of Walsh codes in the NRZ-formatted pump induces little error in the spatial resolution, contrary to the previous results for Golay codes. The maximum signal-to-noise ratio improvement for 8-bit Walsh codes recorded was 3 dB and the spatial resolution obtained was 10 cm, being consistent with analytical and numerical calculations.

Original languageEnglish
Article number094025
JournalMeasurement Science and Technology
Volume24
Issue number9
DOIs
Publication statusPublished - 2013 Sep

Fingerprint

time domain analysis
Time domain analysis
Phase shift
phase shift
spatial resolution
Pumps
pumps
high resolution
pulses
Stimulated Brillouin scattering
Phase modulation
Signal to noise ratio
Modulation
Acoustic waves
phase modulation
time constant
signal to noise ratios
modulation
acoustics
causes

Keywords

  • BOTDA
  • fiber sensor
  • stimulated Brillouin scattering (SBS)
  • Walsh codes

ASJC Scopus subject areas

  • Applied Mathematics
  • Instrumentation

Cite this

The use of Walsh code in modulating the pump light of high spatial resolution phase-shift-pulse Brillouin optical time domain analysis with non-return-to-zero pulses. / Zan, Mohd Saiful Dzulkefly Bin; Tsumuraya, Tatsuya; Horiguchi, Tsuneo.

In: Measurement Science and Technology, Vol. 24, No. 9, 094025, 09.2013.

Research output: Contribution to journalArticle

@article{20f43772f1b14f699b4214e4f2e8d247,
title = "The use of Walsh code in modulating the pump light of high spatial resolution phase-shift-pulse Brillouin optical time domain analysis with non-return-to-zero pulses",
abstract = "We have previously reported phase modulation of pump light of phase-shift pulse Brillouin optical time domain analysis with non-return-to-zero (NRZ)-formatted Golay codes. However, the Brillouin signal has been distorted when the duration of the coded pulse used exceeds the time constant of the amplitude in the acoustic wave that causes stimulated Brillouin scattering. Therefore, we propose pump modulation with Walsh codes to overcome this problem. We have shown that the use of Walsh codes in the NRZ-formatted pump induces little error in the spatial resolution, contrary to the previous results for Golay codes. The maximum signal-to-noise ratio improvement for 8-bit Walsh codes recorded was 3 dB and the spatial resolution obtained was 10 cm, being consistent with analytical and numerical calculations.",
keywords = "BOTDA, fiber sensor, stimulated Brillouin scattering (SBS), Walsh codes",
author = "Zan, {Mohd Saiful Dzulkefly Bin} and Tatsuya Tsumuraya and Tsuneo Horiguchi",
year = "2013",
month = "9",
doi = "10.1088/0957-0233/24/9/094025",
language = "English",
volume = "24",
journal = "Measurement Science and Technology",
issn = "0957-0233",
publisher = "IOP Publishing Ltd.",
number = "9",

}

TY - JOUR

T1 - The use of Walsh code in modulating the pump light of high spatial resolution phase-shift-pulse Brillouin optical time domain analysis with non-return-to-zero pulses

AU - Zan, Mohd Saiful Dzulkefly Bin

AU - Tsumuraya, Tatsuya

AU - Horiguchi, Tsuneo

PY - 2013/9

Y1 - 2013/9

N2 - We have previously reported phase modulation of pump light of phase-shift pulse Brillouin optical time domain analysis with non-return-to-zero (NRZ)-formatted Golay codes. However, the Brillouin signal has been distorted when the duration of the coded pulse used exceeds the time constant of the amplitude in the acoustic wave that causes stimulated Brillouin scattering. Therefore, we propose pump modulation with Walsh codes to overcome this problem. We have shown that the use of Walsh codes in the NRZ-formatted pump induces little error in the spatial resolution, contrary to the previous results for Golay codes. The maximum signal-to-noise ratio improvement for 8-bit Walsh codes recorded was 3 dB and the spatial resolution obtained was 10 cm, being consistent with analytical and numerical calculations.

AB - We have previously reported phase modulation of pump light of phase-shift pulse Brillouin optical time domain analysis with non-return-to-zero (NRZ)-formatted Golay codes. However, the Brillouin signal has been distorted when the duration of the coded pulse used exceeds the time constant of the amplitude in the acoustic wave that causes stimulated Brillouin scattering. Therefore, we propose pump modulation with Walsh codes to overcome this problem. We have shown that the use of Walsh codes in the NRZ-formatted pump induces little error in the spatial resolution, contrary to the previous results for Golay codes. The maximum signal-to-noise ratio improvement for 8-bit Walsh codes recorded was 3 dB and the spatial resolution obtained was 10 cm, being consistent with analytical and numerical calculations.

KW - BOTDA

KW - fiber sensor

KW - stimulated Brillouin scattering (SBS)

KW - Walsh codes

UR - http://www.scopus.com/inward/record.url?scp=84883193166&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84883193166&partnerID=8YFLogxK

U2 - 10.1088/0957-0233/24/9/094025

DO - 10.1088/0957-0233/24/9/094025

M3 - Article

AN - SCOPUS:84883193166

VL - 24

JO - Measurement Science and Technology

JF - Measurement Science and Technology

SN - 0957-0233

IS - 9

M1 - 094025

ER -