Results 21 to 30 of about 24,867 (278)
Denoising of BOTDR Dynamic Strain Measurement Using Convolutional Neural Networks
Sensors, 2023 The Brillouin optical time domain reflectometry (BOTDR) system measures the distributed strain and temperature information along the optic fibre by detecting the Brillouin gain spectra (BGS) and finding the Brillouin frequency shift profiles.
Bo Li, Ningjun Jiang, Xiaole Han
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Sensors, 2023 Brillouin optical time domain reflectometry (BOTDR) detects fiber temperature and strain data and represents one of the most critical ways of identifying abnormal conditions such as ice coverage and lightning strikes on optical fiber composite overhead ...
Xiaojuan Chen, Haoyu Yu
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Applied Sciences, 2019 Brillouin optical correlation-domain technologies are reviewed as “fiber optic nerve systems” for the health monitoring of large structures such as buildings, bridges, and aircraft bodies.
Kazuo Hotate
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Photoacoustics, 2023 Time-domain Brillouin scattering (TDBS) is an all-optical experimental technique for investigating transparent materials based on laser picosecond ultrasonics. Its application ranges from imaging thin-films, polycrystalline materials and biological cells
Motonobu Tomoda +4 more
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3D characterization of individual grains of coexisting high-pressure H2O ice phases by time-domain Brillouin scattering [PDF]
Journal of Applied Physics, 2021 Time-domain Brillouin scattering (TDBS) uses ultrashort laser pulses to (i) generate coherent acoustic pulses of picoseconds duration in a solid sample and (ii) follow their propagation in order to image material inhomogeneities with the axial resolution that can be deeply sub-optical, to nm-scale, and the lateral one down to the optical diffraction ...
Sathyan Sandeep +8 more
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Nonlinear Acoustics at GHz Frequencies in a Viscoelastic Fragile Glass Former [PDF]
, 2014 Using a picosecond pump-probe ultrasonic technique, we study the propagation of high-amplitude, laser-generated longitudinal coherent acoustic pulses in the viscoelastic fragile glass former DC704. We observe an increase of almost ten percent in acoustic
Gusev, Vitalyi E. +3 more
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Stimulated Brillouin scattering modeling for high-resolution, time-domain distributed sensing
Optics Express, 2007 Starting from the standard three-wave SBS coupled equations, we derive a novel expression describing Brillouin interaction between a pulsed pump wave with a finite cw component, and a Stokes continuous wave counter-propagating along a single-mode optical fiber.
BERNINI R., MINARDO, Aldo, ZENI, Luigi
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Analysis of the applicability of singlemode optical fibers for measurement of deformation with distributed systems BOTDR [PDF]
, 2016 Distributed optical fiber sensors allow monitoring physical effects across the whole cable. The paper presents results obtained from the performed tests and shows that single mode fibers can provide analyses of the deformation changes, when distributed ...
Bednárek, Lukáš +4 more
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Journal of Applied Physics, 2023 We report the adiabatic elastic constants of single-crystal thorium dioxide over a temperature range of 77–350 K. Time-domain Brillouin scattering, an all-optical, non-contact picosecond ultrasonic technique, is used to generate and detect coherent acoustic phonons that propagate in the bulk perpendicular to the surface of the crystal.
Amey Khanolkar +6 more
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Ultra-Long-Distance Hybrid BOTDA/Ф-OTDR
Sensors, 2018 In the distributed optical fiber sensing (DOFS) domain, simultaneous measurement of vibration and temperature/strain based on Rayleigh scattering and Brillouin scattering in fiber could have wide applications.
Yun Fu +9 more
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