Results 51 to 60 of about 24,867 (278)
Elastic Wave Eigenmode Solver for Acoustic Waveguides [PDF]
, 2017 A numerical solver for the elastic wave eigenmodes in acoustic waveguides of inhomogeneous cross-section is presented. Operating under the assumptions of linear, isotropic materials, it utilizes a finite-difference method on a staggered grid to solve for
Dostart, Nathan +2 more
core +4 more sources
Research on the Cable Sag On-line Monitoring Using Spontaneous Brillouin Scattering
Guangtongxin yanjiu, 2023 To improve transmission line load capacity and prevent power grid accidents, an online sag monitoring system for overhead transmission lines based on spontaneous Brillouin scattering is designed using the principles of Brillouin scattering and coherent ...
LI Xiao-juan +4 more
doaj
Non-Local Effects in Brillouin Optical Time-Domain Analysis Sensors
Applied Sciences, 2017 Brillouin optical time-domain analysis (BOTDA) sensors have great potential to provide distributed measurements of temperature and strain over large structures with high spatial resolution and measurement precision.
Haritz Iribas +4 more
doaj +1 more source
Micromachines, 2023 In this paper, a novel microwave photonic filter (MPF) based on a single longitudinal mode Brillouin laser achieved by parity time (PT) symmetry mode selection is proposed, and its unparalleled ultra-narrow bandwidth as low as to sub-kHz together with ...
Jiaxin Hou +8 more
doaj +1 more source
Distributed opto-mechanical analysis of liquids outside standard fibers coated with polyimide
, 2019 The analysis of surrounding media has been a long-standing challenge of optical fiber sensors. Measurements are difficult due to the confinement of light to the inner core of standard fibers.
Bashan, Gil +3 more
core +1 more source
Sensors, 2022 Brillouin scattering-based distributed fiber optic sensing (DFOS) technologies such as Brillouin optical time domain reflectometry (BOTDR) and Brillouin optical time domain analysis (BOTDA) have broad applicability for the long term and real-time ...
Samuel Nowak +4 more
doaj +1 more source
Origin of the "Waterfall" Effect in Phonon Dispersion of Relaxor Perovskites [PDF]
, 2003 Inelastic neutron scattering study of the perovskite relaxor ferroelectric PZN:8%PT elucidates the origin of the previously reported unusual kink on the low frequency transverse phonon dispersion curve (known as "waterfall" effect).
Hlinka, J. +5 more
core +2 more sources
IEEE Photonics Journal, 2015 We demonstrate, for the first time to our knowledge, a Brillouin optical time-domain analysis (BOTDA) sensor that is able to operate with a probe power larger than the Brillouin threshold of the deployed sensing fiber and that is free from detrimental ...
Ruben Ruiz-Lombera +5 more
doaj +1 more source
Modulating Electrochemical CO2 Reduction Pathways via Interfacial Electric Field
Advanced Functional Materials, EarlyView.Engineering interfacial electric fields in Cu/ITO electrodes enables precise control of CO2 reduction pathways. Charge transfer from Cu to ITO generates positively charged Cu species that steer selectivity from ethylene toward methane. This work demonstrates how interfacial electric‐field modulation can direct reaction intermediates and transform ...
Mahdi Salehi +7 more
wiley +1 more source
IEEE Access, 2023 The Brillouin optical time-domain reflectometer (BOTDR) system, which is based on the Brillouin frequency shift (BFS) of the scattering spectrum, has been widely applied to monitor the temperature and strain in many fields.
Dong Wan +8 more
doaj +1 more source