Long-Range Distributed Vibration Sensing Based on Phase Extraction from Phase-Sensitive OTDR

Guangyao Yang; Xinyu Fan; Shuai Wang; Bin Wang; Qingwen Liu; Zuyuan He

doi:10.1109/JPHOT.2016.2552820

Long-Range Distributed Vibration Sensing Based on Phase Extraction from Phase-Sensitive OTDR

Guangyao Yang, Xinyu Fan^*, Shuai Wang, Bin Wang, Qingwen Liu, Zuyuan He

^*Corresponding author for this work

Shanghai Jiao Tong University

Research output: Contribution to journal › Article › peer-review

112 Citations (Scopus)

Abstract

Distributed fiber-optic vibration sensors based on phase-sensitive optical time-domain reflectometry (φ-OTDR) have found many applications in various fields. In this paper, we analyze the phase noise of φ-OTDR, which is the main limiting factor of the measurement range. We found that the laser phase noise and phase extraction error caused by the intensity noise in photodetection contribute to the total phase noise. By introducing a series of auxiliary weak reflection points along the fiber, we develop a phase-noise-compensated φ-OTDR and realize a long-range distributed vibration sensing based on the phase extraction. Furthermore, a statistical analysis was proposed to maintain the vibration measurement sensitivity along the whole fiber. In the experiment, vibrations at 30 km were measured with a linear response, which confirmed the validity of our proposed system.

Original language	English
Article number	7458125
Journal	IEEE Photonics Journal
Volume	8
Issue number	3
DOIs	https://doi.org/10.1109/JPHOT.2016.2552820
Publication status	Published - Jun 2016
Externally published	Yes

Keywords

Fiber-optics sensors
Rayleigh scattering
remote sensing and sensors

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10.1109/JPHOT.2016.2552820

Cite this

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title = "Long-Range Distributed Vibration Sensing Based on Phase Extraction from Phase-Sensitive OTDR",

abstract = "Distributed fiber-optic vibration sensors based on phase-sensitive optical time-domain reflectometry (φ-OTDR) have found many applications in various fields. In this paper, we analyze the phase noise of φ-OTDR, which is the main limiting factor of the measurement range. We found that the laser phase noise and phase extraction error caused by the intensity noise in photodetection contribute to the total phase noise. By introducing a series of auxiliary weak reflection points along the fiber, we develop a phase-noise-compensated φ-OTDR and realize a long-range distributed vibration sensing based on the phase extraction. Furthermore, a statistical analysis was proposed to maintain the vibration measurement sensitivity along the whole fiber. In the experiment, vibrations at 30 km were measured with a linear response, which confirmed the validity of our proposed system.",

keywords = "Fiber-optics sensors, Rayleigh scattering, remote sensing and sensors",

author = "Guangyao Yang and Xinyu Fan and Shuai Wang and Bin Wang and Qingwen Liu and Zuyuan He",

note = "Publisher Copyright: {\textcopyright} 2016 IEEE.",

year = "2016",

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doi = "10.1109/JPHOT.2016.2552820",

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journal = "IEEE Photonics Journal",

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AU - Yang, Guangyao

AU - Fan, Xinyu

AU - Wang, Shuai

AU - Wang, Bin

AU - Liu, Qingwen

AU - He, Zuyuan

PY - 2016/6

Y1 - 2016/6

N2 - Distributed fiber-optic vibration sensors based on phase-sensitive optical time-domain reflectometry (φ-OTDR) have found many applications in various fields. In this paper, we analyze the phase noise of φ-OTDR, which is the main limiting factor of the measurement range. We found that the laser phase noise and phase extraction error caused by the intensity noise in photodetection contribute to the total phase noise. By introducing a series of auxiliary weak reflection points along the fiber, we develop a phase-noise-compensated φ-OTDR and realize a long-range distributed vibration sensing based on the phase extraction. Furthermore, a statistical analysis was proposed to maintain the vibration measurement sensitivity along the whole fiber. In the experiment, vibrations at 30 km were measured with a linear response, which confirmed the validity of our proposed system.

AB - Distributed fiber-optic vibration sensors based on phase-sensitive optical time-domain reflectometry (φ-OTDR) have found many applications in various fields. In this paper, we analyze the phase noise of φ-OTDR, which is the main limiting factor of the measurement range. We found that the laser phase noise and phase extraction error caused by the intensity noise in photodetection contribute to the total phase noise. By introducing a series of auxiliary weak reflection points along the fiber, we develop a phase-noise-compensated φ-OTDR and realize a long-range distributed vibration sensing based on the phase extraction. Furthermore, a statistical analysis was proposed to maintain the vibration measurement sensitivity along the whole fiber. In the experiment, vibrations at 30 km were measured with a linear response, which confirmed the validity of our proposed system.

KW - Fiber-optics sensors

KW - Rayleigh scattering

KW - remote sensing and sensors

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Long-Range Distributed Vibration Sensing Based on Phase Extraction from Phase-Sensitive OTDR

Abstract

Keywords

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