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- W1986120968 abstract "A distributed fiber sensing system based on ultraweak FBGs (UWFBGs) assisted polarization optical time-domain reflectometry (POTDR) is proposed for load and vibration sensing with improved signal-to-noise ratio (SNR) and sensitivity. UWFBGs with reflectivity higher than Rayleigh scattering coefficient per pulse are induced into a POTDR system to increase the intensity of the back signal. The performance improvement of the system has been studied. The numerical analysis has shown that the SNR and sensitivity of the system can be effectively improved by integrating UWFBGs along the whole sensing fiber, which has been clearly proven by the experiment. The experimental results have shown that by using UWFBGs with 1.1 × 10 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-5</sup> reflectivity and 10-m interval distance, the SNR is improved by 11 dB, and the load and vibration sensitivities of the POTDR are improved by about 10.7 and 9 dB, respectively." @default.
- W1986120968 created "2016-06-24" @default.
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- W1986120968 date "2015-02-01" @default.
- W1986120968 modified "2023-09-28" @default.
- W1986120968 title "SNR Enhanced Distributed Vibration Fiber Sensing System Employing Polarization OTDR and Ultraweak FBGs" @default.
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- W1986120968 doi "https://doi.org/10.1109/jphot.2015.2396010" @default.
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