A distributed optical fiber sensing system for synchronous vibration and loss measurement

We propose a fully distributed fusion system combining phase-sensitive optical time-domain reflectometry（Φ-OTDR） and OTDR for synchronous vibration and loss measurement by setting an ingenious frequency sweep rate（FSR） of the optical source. The relationships between FSR, probe pulse width and repea...

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Bibliographic Details
Published inOptoelectronics letters Vol. 12; no. 5; pp. 375 - 378
Main Author 张旭苹 乔苇岩 孙振鉷 单媛媛 曾捷 张益昕
Format Journal Article
LanguageEnglish
Published Tianjin Tianjin University of Technology 01.09.2016
Springer Nature B.V
Subjects
Communication networks
Damage detection
Lasers
Noise levels
Optical communication
Optical Devices
Optics
OTDR
Photonics
Physics
Physics and Astronomy
Pulse duration
Reflectometry
Variation
Vibration measurement
光时域反射仪
光纤传感系统
全分布式
同步振动
损耗测量
种用
脉冲宽度
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ISSN1673-1905
1993-5013
DOI10.1007/s11801-016-6133-z

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Summary:We propose a fully distributed fusion system combining phase-sensitive optical time-domain reflectometry（Φ-OTDR） and OTDR for synchronous vibration and loss measurement by setting an ingenious frequency sweep rate（FSR） of the optical source. The relationships between FSR, probe pulse width and repeat period are given to balance the amplitude fluctuation of OTDR traces, the dead zone probability and the measurable frequency range of vibration events. In the experiment, we achieve synchronous vibration and loss measurement with FSR of 40 MHz/s, the proble pulse width of 100 ns and repeat rate of 0.4 ms. The fluctuation of OTDR trace is less than 0.45 dB when the signalto-noise ratio（SNR） is over 12 dB for a captured vibration event located at 9.1 km. The proposed method can be used for not only detection but also early warning of damage events in optical communication networks.
Bibliography:We propose a fully distributed fusion system combining phase-sensitive optical time-domain reflectometry（Φ-OTDR） and OTDR for synchronous vibration and loss measurement by setting an ingenious frequency sweep rate（FSR） of the optical source. The relationships between FSR, probe pulse width and repeat period are given to balance the amplitude fluctuation of OTDR traces, the dead zone probability and the measurable frequency range of vibration events. In the experiment, we achieve synchronous vibration and loss measurement with FSR of 40 MHz/s, the proble pulse width of 100 ns and repeat rate of 0.4 ms. The fluctuation of OTDR trace is less than 0.45 dB when the signalto-noise ratio（SNR） is over 12 dB for a captured vibration event located at 9.1 km. The proposed method can be used for not only detection but also early warning of damage events in optical communication networks.
OTDR traces fluctuation captured measurable coherent fading appearance EDFA warning
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ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-016-6133-z