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- W3010719613 abstract "Brillouin fiber sensors have traditionally been limited to low-speed or static strain measurements due to the time-consuming frequency scans required. In the past decade, a number of novel high-speed measurement techniques have been proposed to enable Brillouin-based dynamic strain sensors. In this work, we present a new mechanism, which can limit the performance of high-speed dynamic Brillouin sensors. Specifically, we show that dynamic strain induced Doppler shifts can corrupt a distributed Brillouin strain measurement by introducing non-local signals throughout the fiber. We present a model showing that these non-local signals can introduce unacceptable levels of cross-talk or even exceed the local signal strength in reasonable operating conditions and experimentally observe these signals in a standard slope-assisted BOTDA sensor. Finally, we present a modified sensor architecture to address this issue and experimentally demonstrate low-noise (2.6 nε/Hz 1/2 ), dynamic strain measurements with significantly reduced sensitivity to this type of non-local signal." @default.
- W3010719613 created "2020-03-23" @default.
- W3010719613 creator A5060555941 @default.
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- W3010719613 date "2020-03-30" @default.
- W3010719613 modified "2023-09-27" @default.
- W3010719613 title "Suppressing non-local effects due to Doppler frequency shifts in dynamic Brillouin fiber sensors" @default.
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- W3010719613 doi "https://doi.org/10.1364/oe.387859" @default.
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