Results 21 to 30 of about 10,558 (240)
Review on Strain Monitoring of Aircraft Using Optical Fibre Sensor [PDF]
International Journal of Electronics and Telecommunications, 2022 Structural health monitoring of aircraft assures safety, integrity and reduces cost-related concerns by reducing the number of times maintenance is required. Under aerodynamic loading, aircraft is subjected to strain, in turn causing damage and breakdown.
Monica Murthy N, Priyanka Desai Kakade
doaj +1 more source
A simple method for fabricating phase-shifted fibre Bragg gratings with flexible choice of centre wavelength [PDF]
, 2009 A simple technique for fabricating phase-shifted fibre Bragg gratings (PSFBGs) without the use of a phase-shifted phase mask is presented. Two, 3-mm long, standard fibre Bragg gratings (FBGs) were inscribed sequentially in singlemode fibre at the same
Chehura, Edmon +2 more
core +1 more source
Regenerated Fibre Bragg Gratings [PDF]
, 2010 Strong regenerated gratings (~18dB, L = 5cm) that can withstand temperatures in excess of 1200°C have been produced. These gratings have a number of potential applications from monitoring furnace temperatures in various fields, to high intensity optical field-resistant gratings for high peak power fibre lasers.
Canning, John +5 more
openaire +2 more sources
A High-Temperature Fiber Sensor Using a Low Cost Interrogation Scheme
Sensors, 2013 Regenerated Fibre Bragg Gratings have the potential for high-temperature monitoring. In this paper, the inscription of Fibre Bragg Gratings (FBGs) and the later regeneration process to obtain Regenerated Fiber Bragg Gratings (RFBGs) in high-birefringence
Salvador Sales, David Barrera
doaj +1 more source
Range-resolved signal processing for fibre segment interferometry applied to dynamic long-gauge length strain sensing [PDF]
, 2015 A range-resolved interferometric signal processing technique using sinusoidal optical frequency modulation is applied to fibre segment interferometry. Here, six optical fibre segments of gauge length 12.5 cm are used as interferometric strain sensors and
Charrett, Thomas O. H. +4 more
core +1 more source
Nonlinear switching in fibre Bragg gratings
Optics Express, 1998 We report on our recent experiments on nonlinear switching in fibre Bragg gratings. Using an all-fibre source we show an increase in transmission of a FBG from 4% to 40% at high powers. This switching is associated with the formation of gap solitons inside the grating.
Broderick, N.G.R. +2 more
openaire +3 more sources
Intrinsic, multiplexable sensors for electric field strength using structural slow light in phase-shifted fibre Bragg gratings [PDF]
, 2012 In this paper we demonstrate through simulation the potential for phase-shifted fibre Bragg gratings incorporating structural slow light to enable intrinsic reflection-mode point sensors for electric field or voltage.
Niewczas, Pawel, Orr, Philip
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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