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- W201615945 abstract "Abstract The temperature dependence of the Brillouin frequency shift in an optical fiber is used as a way toimplement fiber optic distributed temperature sensors. This work presents a simple experimentalsetup to characterize this linear relation. The measured temperature coefficient for the Brillouinfrequency shift was 1,54 Mhz/ o C, which agrees with literature measurements for single mode silicafibers. (FAPESP 00/09731-8) Introduction The stimulated Brillouin scattering, SBS, has been studied as a powerful tool to the development offiber optic distributed sensors since 1990 [1]. This nonlinear optical effect has intrinsic characteristics that makepossible the measurement of the temperature and the strain profiles distributed over the sensor fiber length. Infact, SBS distributed sensors demonstrated measurements resolutions as good as 20µe and 2 o C, with a 5m spatialresolution over a 22Km sensor fiber length [2]. As result, SBS distributed sensors are ideal candidates toimplement structure health monitoring systems to large structures as bridges, pipelines, dams, etc.One of the steps needed to develop Brillouin distributed sensors is the characterization of the thermaland mechanical dependences of the SBS. This communication presents a simple experimental setup to measurethe Brillouin frequency shift as a function of temperature. However the same method could also be exploited tomeasure the strain dependence of the Brillouin effect." @default.
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- W201615945 date "2002-01-01" @default.
- W201615945 modified "2023-10-06" @default.
- W201615945 title "Measurement of the Temperature Coefficient for the Brillouin Frequency Shift in an Optical Fiber" @default.
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