Results 31 to 40 of about 58,600 (289)
Detonation velocity measurements with uniform fibre Bragg gratings.
Optics Express, 2019 In this paper we demonstrate a simple and new fibre optic technique for measuring detonation velocities using uniform fibre Bragg gratings. We compare this new system with chirped fibre Bragg grating diagnostics and show how coherent source illumination ...
Josh Pooley +3 more
semanticscholar +1 more source
Locally Pressed Fibre Bragg Grating Pressure Sensor [PDF]
Optical Fiber Sensors, 2006 A spectral-hole created by locally pressing a fibre Bragg grating exhibited a wavelength-shift within the FBG bandwidth. A sensitivity of 74.3pm/(N/mm) was obtained for pressure applied along the slow axis of a high birefringence fibre.
Correia, Ricardo N. +3 more
openaire +2 more sources
Measurement + Control, 2001 Fibre optic sensing devices have been produced for the dual measurement of strain and temperature using the combined properties of fibre Bragg gratings and the fluorescence lifetime of erbium-doped fibre.
S.A. Wade +7 more
doaj +1 more source
Bi-Signature optical spectroscopy for online fault detection in electrical machines
The Journal of Engineering, 2019 A novel bi-signature optical spectroscopy for fault detection in electrical machines is presented. The combined use of long period grating (LPG) and two fibre Bragg gratings (FBG1 and FBG2) is implemented to discriminate between vibration and temperature
Belema P. Alalibo +2 more
doaj +1 more source
Load monitoring of a cantilever plate by a novel multimodal fibre optic sensing configuration
SN Applied Sciences, 2021 Optical fibre sensors and in particular fibre Bragg gratings (FBG) have received a lot of interest for Structural Health Monitoring in different application fields, such as aerospace, pipeline and civil engineering.
N. Nazeer, R. M. Groves
doaj +1 more source
Quadratic behavior of fiber Bragg grating temperature coefficients [PDF]
, 2004 We describe the characterization of the temperature and strain responses of fiber Bragg grating sensors by use of an interferometric interrogation technique to provide an absolute measurement of the grating wavelength. The fiber Bragg grating temperature
Brady +18 more
core +1 more source
CYTOP Fibre Bragg Grating Sensors for Harsh Radiation Environments
Sensors, 2019 We present a polymer fibre Bragg grating sensor and its sensitivity to gamma radiation by observing the reflected spectral profile. The Bragg grating is femtosecond inscribed within a perfluorinated CYTOP fibre and the alteration of the Bragg wavelength ...
Christian Broadway +6 more
doaj +1 more source
Intrinsic Fabry-Perot Sensors for Magnetic Field Detection
EPJ Web of Conferences, 2018 Within the context of ensuring stable nuclear fusion, it is important to monitor and control a number of parametersincluding the magnetic field associated with plasma circulation.
Broadway Christian +4 more
doaj +1 more source
MONITORING AND SAFETY OF HANDLING EQUIPMENT [PDF]
Management Systems in Production Engineering, 2014 The paper presents a new solution for continuous measurement of deformations of the beam of travelling crane based on optical fibre Bragg gratings system.
Janusz JURASZEK
doaj +1 more source
Improved design of a DFB Raman fibre laser [PDF]
, 2009 A Raman fibre laser based on phase shifted DFB structures is modelled for the first time. Using parameters of realistic devices, the model predicts low-threshold and highly-efficient laser output.
Broderick +13 more
core +1 more source