Results 101 to 110 of about 292,649 (389)

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

Quadratic behavior of fiber Bragg grating temperature coefficients [PDF]

open access: yes, 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

Giant Berry‐phase‐Driven X‐Ray Beam Translations in Strain‐Engineered Semiconductor Crystals

open access: yesAdvanced Materials, EarlyView.
Due to the Berry‐phase effect, X‐rays propagating in deformed crystals undergo large translations, interesting for X‐ray optics applications. Here, the lattice expansion observed upon H irradiation of dilute‐nitride semiconductors is exploited to engineer the deformation landscape of selectively hydrogenated GaAsN epilayers.
Marco Felici   +9 more
wiley   +1 more source

Reflectivity and Bandwidth Modulation of Fiber Bragg Gratings in a Suspended Core Fiber by Tunable Acoustic Waves

open access: yesIEEE Photonics Journal, 2014
The acousto-optic modulation of fiber Bragg gratings in a four-hole suspended core fiber is experimentally demonstrated. Strong modulations with a reflectivity amplitude decrease by up to 67% and a 57% bandwidth increase in the Bragg resonance are ...
Ricardo E. Silva   +5 more
doaj   +1 more source

Multiband processing of multimode light: combining 3D photonic lanterns with waveguide Bragg gratings

open access: yes, 2013
The first demonstration of narrowband spectral filtering of multimode light on a 3D integrated photonic chip using photonic lanterns and waveguide Bragg gratings is reported. The photonic lanterns with multi-notch waveguide Bragg gratings were fabricated
Gross, Simon   +6 more
core   +1 more source

Volume diffraction gratings for optical telecommunications applications: design study for a spectral equalizer [PDF]

open access: yes, 2004
The main characteristics required for a diffraction grating used for demultiplexing functions in spectral equalizing systems are investigated, both theoretically and experimentally.
Chevallier, Raymond   +5 more
core   +1 more source

Type I and II Bragg gratings made with infrared femtosecond radiation in high and low alumina content aluminosilicate optical fibers

open access: yes, 2015
Aluminosilicate fibers have very low Brillouin scattering gain coefficients, making them interesting fibers for nonlinear optical applications. We manufactured Bragg gratings in high (30 mol.%) and low (4 mol.%) alumina content optical fiber using 800 nm
D. Grobnic   +3 more
semanticscholar   +1 more source

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

open access: yesAdvanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea   +9 more
wiley   +1 more source

Advanced fibre Bragg grating structures: design and application

open access: yes, 2004
This thesis presents experimental and computational work on a variety of advanced fibre Bragg grating structures covering long dispersion compensating chirped Bragg gratings, superstructured Bragg gratings for identical multiple channel operation, Bragg ...
Ibsen, Morten
core  

Rigorous analysis of grazing-angle scattering of electromagnetic waves in periodic gratings [PDF]

open access: yes, 2003
Grazing-angle scattering (GAS) is a type of Bragg scattering of waves in slanted non-uniform periodic gratings, when the diffracted order satisfying the Bragg condition propagates at a grazing angle with respect to the boundaries of a slab-like grating ...
Bakhturin   +14 more
core   +4 more sources

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