Numerical Analysis and Recursive Compensation of Position Deviation for a Sub-Millimeter Resolution OFDR
We analyze the source of the position deviation and propose a demodulation recursive compensation algorithm to ensure a sub-millimeter resolution in improved optical frequency domain reflectometry. The position deviation between the geometric path and optical path changes with the temperature or str...
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doaj-7a18da4f083d48f1a83a92d6eb4491a42020-11-25T03:54:38ZengMDPI AGSensors1424-82202020-09-01205540554010.3390/s20195540Numerical Analysis and Recursive Compensation of Position Deviation for a Sub-Millimeter Resolution OFDRYueying Cheng0Mingming Luo1Jianfei Liu2Nannan Luan3School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, ChinaWe analyze the source of the position deviation and propose a demodulation recursive compensation algorithm to ensure a sub-millimeter resolution in improved optical frequency domain reflectometry. The position deviation between the geometric path and optical path changes with the temperature or strain, due to the elastic-optic and thermal-optic effects. It accumulates along the fiber and becomes large enough to affect the spectral correlation between the measured and reference spectra at the fiber end. The proposed algorithm compensates for the position deviation of each measuring point and aligns the measured spectra with its reference. The numerical and experimental results both reveal that the signal-to-noise ratio of the correlation is improved doubly and a sub-millimeter spatial resolution becomes available at a 30 m fiber end. The recursive compensation algorithm helps to restrain the correlation degeneration at the fiber end and promises an effective approach to a sub-millimeter resolution in optical frequency domain reflectometry.https://www.mdpi.com/1424-8220/20/19/5540optical frequency domain reflectometryposition deviation compensationsub-millimeter spatial resolution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yueying Cheng Mingming Luo Jianfei Liu Nannan Luan |
spellingShingle |
Yueying Cheng Mingming Luo Jianfei Liu Nannan Luan Numerical Analysis and Recursive Compensation of Position Deviation for a Sub-Millimeter Resolution OFDR Sensors optical frequency domain reflectometry position deviation compensation sub-millimeter spatial resolution |
author_facet |
Yueying Cheng Mingming Luo Jianfei Liu Nannan Luan |
author_sort |
Yueying Cheng |
title |
Numerical Analysis and Recursive Compensation of Position Deviation for a Sub-Millimeter Resolution OFDR |
title_short |
Numerical Analysis and Recursive Compensation of Position Deviation for a Sub-Millimeter Resolution OFDR |
title_full |
Numerical Analysis and Recursive Compensation of Position Deviation for a Sub-Millimeter Resolution OFDR |
title_fullStr |
Numerical Analysis and Recursive Compensation of Position Deviation for a Sub-Millimeter Resolution OFDR |
title_full_unstemmed |
Numerical Analysis and Recursive Compensation of Position Deviation for a Sub-Millimeter Resolution OFDR |
title_sort |
numerical analysis and recursive compensation of position deviation for a sub-millimeter resolution ofdr |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2020-09-01 |
description |
We analyze the source of the position deviation and propose a demodulation recursive compensation algorithm to ensure a sub-millimeter resolution in improved optical frequency domain reflectometry. The position deviation between the geometric path and optical path changes with the temperature or strain, due to the elastic-optic and thermal-optic effects. It accumulates along the fiber and becomes large enough to affect the spectral correlation between the measured and reference spectra at the fiber end. The proposed algorithm compensates for the position deviation of each measuring point and aligns the measured spectra with its reference. The numerical and experimental results both reveal that the signal-to-noise ratio of the correlation is improved doubly and a sub-millimeter spatial resolution becomes available at a 30 m fiber end. The recursive compensation algorithm helps to restrain the correlation degeneration at the fiber end and promises an effective approach to a sub-millimeter resolution in optical frequency domain reflectometry. |
topic |
optical frequency domain reflectometry position deviation compensation sub-millimeter spatial resolution |
url |
https://www.mdpi.com/1424-8220/20/19/5540 |
work_keys_str_mv |
AT yueyingcheng numericalanalysisandrecursivecompensationofpositiondeviationforasubmillimeterresolutionofdr AT mingmingluo numericalanalysisandrecursivecompensationofpositiondeviationforasubmillimeterresolutionofdr AT jianfeiliu numericalanalysisandrecursivecompensationofpositiondeviationforasubmillimeterresolutionofdr AT nannanluan numericalanalysisandrecursivecompensationofpositiondeviationforasubmillimeterresolutionofdr |
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1724472603383431168 |