Results 31 to 40 of about 6,027 (232)

Monitoring of Torque Induced Strain in Composite Shafts with Embedded and Surface-Mounted Optical Fiber Bragg Gratings

open access: yesSensors, 2021
In this study, silica glass, optical fiber Bragg gratings (FBGs) are used for torque-induced strain monitoring in carbon fiber reinforced polymer (CFRP) hollow shafts toward the development of a methodology for structural load monitoring.
Maria Konstantaki   +11 more
doaj   +1 more source

Passive Temperature-Compensating Technique for Microstructured Fiber Bragg Gratings [PDF]

open access: yes, 2008
The thermal drift of the characteristic wavelength of fiber Bragg gratings (FBGs) photowritten in the core of microstructured fibers (MOFs) is significantly reduced by inserting a liquid of suitable refractive index into their holes.
Bernard Dussardier   +7 more
core   +6 more sources

Gas-Flow Sensor using Optical Fiber Bragg Grating(FBG)

open access: yesJournal of Navigation and Port Research, 2008
We have proposed and demonstrated an gas-flow sensor using optical fiber bragg grating(FEG). The flow sensor has no electronics and no mechanical parts in its sensing part and the structure is th11s simple and immune to electromagnetic interference(EMI). The FEG sensor was consisted qf the sensing element and a coil heater.
Joon-Hwan Shim   +3 more
openaire   +2 more sources

Tilted Fiber Bragg Gratings (TFBGs) Temperature Sensing Element Using 244nm AR+ Laser Written on Side Hole Fiber

open access: yesDiyala Journal of Engineering Sciences, 2015
Tilted Fiber Bragg Gratings (TFBGs) are designed and implemented at the 1550 nm communication window in Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, China.
Riyadh Khlf Ahmed   +3 more
doaj   +1 more source

Nearly chirp- and pedestal-free pulse compression in nonlinear fiber Bragg gratings [PDF]

open access: yes, 2009
Peer reviewedPublisher ...
Li, Qian   +3 more
core   +1 more source

Rapid characterization of the ultraviolet induced fiber Bragg grating complex coupling coefficient as a function of irradiance and exposure time [PDF]

open access: yes, 2007
We report the application of optical frequency domain reflectometry and a discrete-layer-peeling inverse scattering algorithm to the spatial characterization of the UV induced complex coupling coefficient during fiber Bragg grating growth.
Cranch, Geoffrey A.   +2 more
core   +1 more source

Advances on Polymer Optical Fiber Gratings Using a KrF Pulsed Laser System Operating at 248 nm

open access: yesFibers, 2018
This paper presents the achievements and progress made on the polymer optical fiber (POF) gratings inscription in different types of Fiber Bragg Gratings (FBGs) and long period gratings (LPGs). Since the first demonstration of POFBGs in 1999, significant
Carlos A. F. Marques   +7 more
doaj   +1 more source

Klein tunneling of light in fiber Bragg gratings [PDF]

open access: yes, 2010
A photonic analogue of Klein tunneling (KT), i.e. of the exotic property of relativistic electrons to pass a large repulsive and sharp potential step, is proposed for pulse propagation in a nonuniform fiber Bragg grating with an embedded chirped region ...
Longhi, Stefano
core   +3 more sources

Quasi-Distributed Temperature and Strain Sensors Based on Series-Integrated Fiber Bragg Gratings

open access: yesNanomaterials, 2022
Two types of series-integrated fiber Bragg gratings (SI-FBGs), i.e., strong and weak SI-FBGs, were inscribed in a standard single-mode fiber (SMF) using the femtosecond laser point-by-point technology.
Huajian Zhong   +10 more
doaj   +1 more source

RTM production monitoring of the A380 hinge arm droop nose mechanism: a multi-sensor approach [PDF]

open access: yes, 2016
his research presents a case study of production monitoring on an aerospace composite component: the hinge arm of the droop nose mechanism on the Airbus A380 wing leading edge.
Chiesura, Gabriele   +7 more
core   +2 more sources

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