Results 31 to 40 of about 197,759 (301)
, 1997 A twin-bridge calorimeter using optical fiber as the sensor element was constructed and tested. This system demonstrates the principle and capability of using optical fibers for heat-flow measurements of special nuclear material. This calorimeter uses piezoelectric-generated phase-carrier modulation with subsequent electronic signal processes to allow ...
Rudy, C. +4 more
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Spatial Spectral Characteristics of Partial Discharge with Different Electrode Models
Photonics, 2023 In this paper, the spatial spectral characteristics of partial discharge (PD) under different electrode models are mainly studied. In the initial corona discharge stage, the emission spectrum is mainly emitted by the N2(C3IIu→B3IIg) energy level ...
Taiqi Wang +6 more
doaj +1 more source
Optics Express, 2008 Described herein are initial experimental details and properties of a silicon core, silica glass-clad optical fiber fabricated using conventional optical fiber draw methods. Such semiconductor core fibers have potential to greatly influence the fields of nonlinear fiber optics, infrared and THz power delivery.
J, Ballato +14 more
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Polarization Modulation Instability in Dispersion-Engineered Photonic Crystal Fibers
Crystals, 2021 Generation of widely spaced polarization modulation instability (PMI) sidebands in a wide collection of photonic crystal fibers (PCF), including liquid-filled PCFs, is reported. The contribution of chromatic dispersion and birefringence to the net linear
Abraham Loredo-Trejo +3 more
doaj +1 more source
Recent Advances in Phase-Sensitive Optical Time Domain Reflectometry (Ф-OTDR)
Photonic Sensors, 2021 Phase-sensitive optical time domain reflectometry (Ф-OTDR) is an effective way to detect vibrations and acoustic waves with high sensitivity, by interrogating coherent Rayleigh backscattering light in sensing fiber. In particular, fiber-optic distributed
Yunjiang Rao +4 more
doaj +1 more source
Precision near-infrared radial velocity instrumentation II: Non-Circular Core Fiber Scrambler [PDF]
, 2013 We have built and commissioned a prototype agitated non-circular core fiber scrambler for precision spectroscopic radial velocity measurements in the near-infrared H band.
Anglada-Escude, Guillem +20 more
core +2 more sources
Hierarchical Attention Neural Network for Event Types to Improve Event Detection
Sensors, 2022 Event detection is an important task in the field of natural language processing, which aims to detect trigger words in a sentence and classify them into specific event types.
Yanliang Jin +5 more
doaj +1 more source
Enhanced Optical Fiber Lasers and Optical Fiber Sensors Assisted by Micro-drilled Optical Fibers
Optical Fiber Sensors Conference 2020 Special Edition, 2021 Enhanced OFS assisted by micro-drilled optical fibers acting as mirrors are demonstrated. Strain sensitivity improved more than one order of magnitude in comparison with FBG sensors using a 50 μm-waist micro-drilled taper as distributed reflector.
Pérez Herrera, Rosa Ana +6 more
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A one-dimensional ultracold medium of extreme optical depth
, 2013 We report on the preparation of a one-dimensional ultracold medium in a hollow-core photonic crystal fiber, reaching an effective optical depth of 1000(150).
Blatt, Frank +2 more
core +1 more source
Microbend fiber-optic sensor [PDF]
Applied Optics, 1984 Intensity modulation induced by microbending in multimode fibers is considered as a transduction mechanism for detecting environmental changes such as pressure, temperature, acceleration, and magnetic and electric fields. A generic microbend sensor has been defined and studied, and its components, such as sensing fiber, light source, optical fiber ...
N, Lagakos, J H, Cole, J A, Bucaro
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