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Double peak-induced distance error in STFT-BOTDR event detection and the recovery method

Double peak-induced distance error in STFT-BOTDR event detection and the recovery method
Double peak-induced distance error in STFT-BOTDR event detection and the recovery method
The measured distance error caused by double peaks in the BOTDRs (Brillouin optical time domain reflectometers) system is a kind of Brillouin scattering spectrum (BSS) deformation, discussed and simulated for the first time in the paper, to the best of the authors' knowledge. Double peak, as a kind of Brillouin spectrum deformation, is important in the enhancement of spatial resolution, measurement accuracy, and crack detection. Due to the variances of the peak powers of the BSS along the fiber, the measured starting point of a step-shape frequency transition region is shifted and results in distance errors. Zero-padded short-time-Fourier-transform (STFT) can restore the transition-induced double peaks in the asymmetric and deformed BSS, thus offering more accurate and quicker measurements than the conventional Lorentz-fitting method. The recovering method based on the double-peak detection and corresponding BSS deformation can be applied to calculate the real starting point, which can improve the distance accuracy of the STFT-based BOTDR system.
0003-6935
E196-E202
Yu, Yifei
5796fabf-53ec-4312-a5c0-93c172023d88
Luo, Liqing
b49f4d22-ed5f-40ea-87af-b08ee814d7a3
Li, Bo
30acbe59-a3fe-47a8-9e6a-2dd279f38a7a
Guo, Linfeng
f2cbcec5-f0c2-4596-a8bf-e0920e8c41c0
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Soga, Kenichi
e43028e3-af4d-4ea4-a747-6cc6dacc849b
Yu, Yifei
5796fabf-53ec-4312-a5c0-93c172023d88
Luo, Liqing
b49f4d22-ed5f-40ea-87af-b08ee814d7a3
Li, Bo
30acbe59-a3fe-47a8-9e6a-2dd279f38a7a
Guo, Linfeng
f2cbcec5-f0c2-4596-a8bf-e0920e8c41c0
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Soga, Kenichi
e43028e3-af4d-4ea4-a747-6cc6dacc849b

Yu, Yifei, Luo, Liqing, Li, Bo, Guo, Linfeng, Yan, Jize and Soga, Kenichi (2015) Double peak-induced distance error in STFT-BOTDR event detection and the recovery method. Applied Optics, 54 (28), E196-E202. (doi:10.1364/AO.54.00E196).

Record type: Article

Abstract

The measured distance error caused by double peaks in the BOTDRs (Brillouin optical time domain reflectometers) system is a kind of Brillouin scattering spectrum (BSS) deformation, discussed and simulated for the first time in the paper, to the best of the authors' knowledge. Double peak, as a kind of Brillouin spectrum deformation, is important in the enhancement of spatial resolution, measurement accuracy, and crack detection. Due to the variances of the peak powers of the BSS along the fiber, the measured starting point of a step-shape frequency transition region is shifted and results in distance errors. Zero-padded short-time-Fourier-transform (STFT) can restore the transition-induced double peaks in the asymmetric and deformed BSS, thus offering more accurate and quicker measurements than the conventional Lorentz-fitting method. The recovering method based on the double-peak detection and corresponding BSS deformation can be applied to calculate the real starting point, which can improve the distance accuracy of the STFT-based BOTDR system.

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More information

Accepted/In Press date: 1 September 2015
e-pub ahead of print date: 1 September 2015
Published date: 21 September 2015
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 393247
URI: http://eprints.soton.ac.uk/id/eprint/393247
ISSN: 0003-6935
PURE UUID: d893dd2b-4d04-45ed-ab81-973fc6118a59
ORCID for Jize Yan: ORCID iD orcid.org/0000-0002-2886-2847

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Date deposited: 25 Apr 2016 09:41
Last modified: 09 Jan 2022 03:50

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Contributors

Author: Yifei Yu
Author: Liqing Luo
Author: Bo Li
Author: Linfeng Guo
Author: Jize Yan ORCID iD
Author: Kenichi Soga

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