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- W2799294747 abstract "Distributed acoustic sensing (DAS) using coherent Rayleigh backscattering in an optical fiber has become a ubiquitous technique for monitoring multiple dynamic events in real time. It has continued to constitute a steadily increasing share of the fiber-optic sensor market, thanks to its interesting applications in many safety, security, and integrity monitoring systems. In this contribution, an overview of the recent advances of research in DAS based on phase-sensitive optical time domain reflectometry ( ϕ -OTDR) is provided. Some advanced techniques used to enhance the performance of ϕ -OTDR sensors for measuring backscattering intensity changes through reduction of measurement noise are presented, in addition to methods used to increase the dynamic measurement capacity of ϕ -OTDR schemes beyond conventional limits set by the sensing distance. Recent ϕ -OTDR configurations which significantly enhance the measurement spatial resolution, including those which decouple it from the probing pulse width, are also discussed. Finally, a review of recent advances in more precise quantitative measurement of an external impact based on frequency shift and phase demodulation methods using simple direct detection ϕ -OTDR schemes is given." @default.
- W2799294747 created "2018-05-17" @default.
- W2799294747 creator A5084200887 @default.
- W2799294747 date "2018-01-01" @default.
- W2799294747 modified "2023-10-12" @default.
- W2799294747 title "Recent Advances in Distributed Acoustic Sensing Based on Phase-Sensitive Optical Time Domain Reflectometry" @default.
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- W2799294747 doi "https://doi.org/10.1155/2018/3897873" @default.
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