抄録
Distributed strain and temperature can be measured by using local Brillouin backscatter in optical fibers based on the strain and temperature dependence of the Brillouin frequency shift. The technique of analyzing the local Brillion backscatter in the time domain is called Brillouin optical time domain reflectometry (BOTDR). Although the best spatial resolution of classic BOTDR remains at around 1 m, some recent BOTDR techniques have attained as high as cm-scale spatial resolution. Our laboratory has proposed and demonstrated a high-spatial-resolution BOTDR called phase-shift pulse BOTDR (PSP-BOTDR), using a pair of probe pulses modulated with binary phase-shift keying. PSP-BOTDR is based on the cross-correlation of Brillouin backscatter and on the subtraction of cross-correlations obtained from the Brillouin scatterings evoked by each phase-modulated probe pulse. Although PSP-BOTDR has attained 20-cm spatial resolution, the spectral analysis method of PSP-BOTDR has not been discussed in detail. This article gives in-depth analysis of the Brillouin backscatter and the correlations of the backscatters of the PSP-BOTDR. Based on the analysis, we propose new spectral analysis methods for PSP-BOTDR. The analysis and experiments show that the proposed methods give better frequency resolution than before.
| 元の言語 | English |
|---|---|
| 記事番号 | 1497 |
| ジャーナル | Sensors (Switzerland) |
| 巻 | 19 |
| 発行部数 | 7 |
| DOI | |
| 出版物ステータス | Published - 2019 4 1 |
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ASJC Scopus subject areas
- Analytical Chemistry
- Atomic and Molecular Physics, and Optics
- Biochemistry
- Instrumentation
- Electrical and Electronic Engineering
これを引用
Analysis of phase-shift pulse brillouin optical time-domain reflectometry. / Horiguchi, Tsuneo; Masui, Yuki; Zan, Mohd Saiful Dzulkefly.
：: Sensors (Switzerland), 巻 19, 番号 7, 1497, 01.04.2019.研究成果: Article
}
TY - JOUR
T1 - Analysis of phase-shift pulse brillouin optical time-domain reflectometry
AU - Horiguchi, Tsuneo
AU - Masui, Yuki
AU - Zan, Mohd Saiful Dzulkefly
PY - 2019/4/1
Y1 - 2019/4/1
N2 - Distributed strain and temperature can be measured by using local Brillouin backscatter in optical fibers based on the strain and temperature dependence of the Brillouin frequency shift. The technique of analyzing the local Brillion backscatter in the time domain is called Brillouin optical time domain reflectometry (BOTDR). Although the best spatial resolution of classic BOTDR remains at around 1 m, some recent BOTDR techniques have attained as high as cm-scale spatial resolution. Our laboratory has proposed and demonstrated a high-spatial-resolution BOTDR called phase-shift pulse BOTDR (PSP-BOTDR), using a pair of probe pulses modulated with binary phase-shift keying. PSP-BOTDR is based on the cross-correlation of Brillouin backscatter and on the subtraction of cross-correlations obtained from the Brillouin scatterings evoked by each phase-modulated probe pulse. Although PSP-BOTDR has attained 20-cm spatial resolution, the spectral analysis method of PSP-BOTDR has not been discussed in detail. This article gives in-depth analysis of the Brillouin backscatter and the correlations of the backscatters of the PSP-BOTDR. Based on the analysis, we propose new spectral analysis methods for PSP-BOTDR. The analysis and experiments show that the proposed methods give better frequency resolution than before.
AB - Distributed strain and temperature can be measured by using local Brillouin backscatter in optical fibers based on the strain and temperature dependence of the Brillouin frequency shift. The technique of analyzing the local Brillion backscatter in the time domain is called Brillouin optical time domain reflectometry (BOTDR). Although the best spatial resolution of classic BOTDR remains at around 1 m, some recent BOTDR techniques have attained as high as cm-scale spatial resolution. Our laboratory has proposed and demonstrated a high-spatial-resolution BOTDR called phase-shift pulse BOTDR (PSP-BOTDR), using a pair of probe pulses modulated with binary phase-shift keying. PSP-BOTDR is based on the cross-correlation of Brillouin backscatter and on the subtraction of cross-correlations obtained from the Brillouin scatterings evoked by each phase-modulated probe pulse. Although PSP-BOTDR has attained 20-cm spatial resolution, the spectral analysis method of PSP-BOTDR has not been discussed in detail. This article gives in-depth analysis of the Brillouin backscatter and the correlations of the backscatters of the PSP-BOTDR. Based on the analysis, we propose new spectral analysis methods for PSP-BOTDR. The analysis and experiments show that the proposed methods give better frequency resolution than before.
KW - Brillouin optical time domain reflectometry
KW - Brillouin scattering
KW - Distributed fiber sensor
KW - Fast fourier transform
KW - Signal processing
KW - Spectral analysis
KW - Strain and temperature sensor
UR - http://www.scopus.com/inward/record.url?scp=85064218329&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85064218329&partnerID=8YFLogxK
U2 - 10.3390/s19071497
DO - 10.3390/s19071497
M3 - Article
C2 - 30934806
AN - SCOPUS:85064218329
VL - 19
JO - Sensors
JF - Sensors
SN - 1424-3210
IS - 7
M1 - 1497
ER -