An OTDR and gratings assisted multifunctional fiber sensing system

Xiangchuan Wang; Zhijun Yan; Feng Wang; Ji Hua; Chengbo Mou; Zhongyuan Sun; Xuping Zhang; Lin Zhang

doi:10.1109/JSEN.2015.2427194

An OTDR and gratings assisted multifunctional fiber sensing system

Xiangchuan Wang, Zhijun Yan, Feng Wang, Ji Hua, Chengbo Mou, Zhongyuan Sun, Xuping Zhang, Lin Zhang

Aston Institute of Photonic Technologies (AiPT)

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

Abstract

We report a distributed multifunctional fiber sensing network based on weak-fiber Bragg gratings (WFBGs) and long period fiber grating (LPG) assisted OTDR system. The WFBGs are applied for temperature, strain, and vibration monitoring at key position, and the LPG is used as a linear filter in the system to convert the wavelength shift of WFBGs caused by environmental change into the power change. The simulation results show that it is possible to integrate more than 4472 WFBGs in the system when the reflectivity of WFBGs is less than {10}^{-5}. Besides, the back-Rayleigh scattering along the whole fiber can also be detected which makes distributed bend sensing possible. As an experimental demonstration, we have used three WFBGs UV-inscribed with 50-m interval at the end of a 2.6-km long fiber, which part was subjected for temperature, strain, and vibration sensing, respectively. The ratio of the intensity of output and input light is used for temperature and strain sensing, and the results show strain and temperature sensitivities are 4.2 \times {10}^{-4}{/\mu \varepsilon } and 5.9 \times {10}^{-3}{{/ {^{\circ }}\textrm {C}}} , respectively. Detection of multiple vibrations and single vibration with the broad frequency band up to 500 Hz are also achieved. In addition, distributed bend sensing which could be simultaneously realized in this system has been proposed.

Original language	English
Pages (from-to)	4660-4666
Number of pages	7
Journal	IEEE Sensors Journal
Volume	15
Issue number	8
Early online date	28 Apr 2015
DOIs	https://doi.org/10.1109/JSEN.2015.2427194
Publication status	Published - Aug 2015

Bibliographical note

© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Keywords

optical fiber gratings
optical fiber measurements
optical time domain reflectometry
vibration measurement

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10.1109/JSEN.2015.2427194

OTDR and gratings assisted multifunctional fiber sensing system
© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7096948

Cite this

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title = "An OTDR and gratings assisted multifunctional fiber sensing system",

abstract = "We report a distributed multifunctional fiber sensing network based on weak-fiber Bragg gratings (WFBGs) and long period fiber grating (LPG) assisted OTDR system. The WFBGs are applied for temperature, strain, and vibration monitoring at key position, and the LPG is used as a linear filter in the system to convert the wavelength shift of WFBGs caused by environmental change into the power change. The simulation results show that it is possible to integrate more than 4472 WFBGs in the system when the reflectivity of WFBGs is less than {10}^{-5}. Besides, the back-Rayleigh scattering along the whole fiber can also be detected which makes distributed bend sensing possible. As an experimental demonstration, we have used three WFBGs UV-inscribed with 50-m interval at the end of a 2.6-km long fiber, which part was subjected for temperature, strain, and vibration sensing, respectively. The ratio of the intensity of output and input light is used for temperature and strain sensing, and the results show strain and temperature sensitivities are 4.2 \times {10}^{-4}{/\mu \varepsilon } and 5.9 \times {10}^{-3}{{/ {^{\circ }}\textrm {C}}} , respectively. Detection of multiple vibrations and single vibration with the broad frequency band up to 500 Hz are also achieved. In addition, distributed bend sensing which could be simultaneously realized in this system has been proposed.",

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author = "Xiangchuan Wang and Zhijun Yan and Feng Wang and Ji Hua and Chengbo Mou and Zhongyuan Sun and Xuping Zhang and Lin Zhang",

note = "{\textcopyright} 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.",

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AU - Zhang, Xuping

AU - Zhang, Lin

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An OTDR and gratings assisted multifunctional fiber sensing system

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Keywords

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