Results 41 to 50 of about 45,769 (300)
Properties of length-apodized phase-shifted lpgs operating at the phase matching turning point
, 2012 The characteristics of length-apodized phase-shifted fiber optic long period gratings with full and partial nanostructured coatings have been explored theoretically and experimentally.
James, Stephen W. +2 more
core +1 more source
Large bandwidth, highly efficient optical gratings through high index materials [PDF]
, 2008 We analyze the diffraction characteristics of dielectric gratings that feature a high index grating layer, and devise, through rigorous numerical calculations, large bandwidth, highly efficient, high dispersion dielectric gratings in reflection ...
Baldry +17 more
core +5 more sources
Long Period Fiber Gratings Inscribed With an Improved Two-Dimensional Scanning Technique
IEEE Photonics Journal, 2014 We demonstrated a promising CO2 laser irradiation system based on an improved 2-D scanning technique. Such a system could be used to inscribe high-quality long period fiber gratings (LPFGs) with good reproducibility of grating inscription, which ...
Xiaoyong Zhong +7 more
doaj +1 more source
Effect of Low-Doses of Gamma Radiation on Electric Arc-Induced Long Period Fiber Gratings
Sensors, 2021 This work presents an experimental study on the effects of gamma radiation on Long Period Fiber Gratings (LPFGs) in a low-dose test campaign to evaluate their eventual degradation.
Patricia Mesonero-Santos +6 more
doaj +1 more source
Slow light with flat or offset band edges in multi-mode fiber with two gratings
, 2007 We consider mode coupling in multimode optical fibers using either two Bragg gratings or a Bragg grating and a long-period grating. We show that the magnitude of the band edge curvature can be controlled leading to a flat, quartic band-edge or to two ...
de Sterke, C. Martijn +3 more
core +1 more source
Long Period Gratings Formed in Depressed Cladding Fibres [PDF]
Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals, 1997 There has been a significant interest in long period gratings, primarily due to their applications in gain-flattened erbium doped fibre amplifiers [1]. Up till now, cladding modes supported by the glass-air interface of an optical fibre have been used in a forward mode coupling scheme involving also the guided fundamental mode of the optical fibre ...
Dong, L., Reekie, L., Cruz, J.L.
openaire +4 more sources
Fiber optic long period grating sensors with a nanoassembled mesoporous film of SiO2 nanoparticles [PDF]
, 2010 A novel approach to chemical application of long period grating (LPG) optical fibers was demonstrated, which were modified with a film nanoassembled by the alternate deposition of SiO2 nanoparticles (SiO2 NPs) and poly(diallyldimethyl ammonium ...
Korposh, Sergiy +6 more
core +1 more source
Advanced Functional Materials, EarlyView.This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner +9 more
wiley +1 more source
High Temperature Long Period Grating Thermo-Mechanically Written [PDF]
Sensors, 2009 An optical fiber transducer able to work in high temperature environments is experimentally demonstrated in the laboratory. It is based on a permanent long period grating (LPG) written using a new technique based on a thermo-mechanical approach. Device precision was experimentally checked by means of repetitive thermal cycles between 25 and 950 ºC.
Lázaro Urrutia, José Miguel +2 more
openaire +4 more sources
Advanced Functional Materials, EarlyView.Multifunctional atomic layer deposited coatings and interface treatments enhance direct solar water splitting on GaAs/GaInP tandem cells. Optimized TiO2/Pt nanoparticle bilayers ensure durability and catalytic efficiency with minimal optical losses, while H2 plasma pretreatments maximize photovoltage and interfacial charge extraction.
Tim F. Rieth +8 more
wiley +1 more source