Results 1 to 10 of about 35,600 (283)
Secondary Grating Formation by Readout at Bragg-null Incidence [PDF]
, 1999 We show that when a dynamic hologram is read out by illumination at the Bragg nulls of a previously recorded grating the diffracted beam inside the medium can result in the recording of two secondary gratings that alter the final selectivity curve.
Adibi, Ali +3 more
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Design of arbitrary optical filters in silicon-on-insulator using evanescently-coupled Bragg gratings [PDF]
, 2019 Spectral filters are experiencing an increasing demand in several applications of the silicon- on-insulator (SOI) platform. Many works have demonstrated that arbitrary frequency responses can be synthesized by apodizing the coupling coefficient profile
Cheben, Pavel +8 more
core
Direct optical observation of walls and disclination effects in active photonic devices
, 2009 Liquid crystal tunable Bragg Gratings defined in planar substrates via a laser patterning technique exhibit complex wavelength tuning. This tuning displays threshold points and hysteresis. These tuning features are shown to be a manifestation of physical
Adikan, F.R.M. +7 more
core +1 more source
Properties of complexly periodic inhomogeneous systems in radio and optical guiding structures
Физика волновых процессов и радиотехнические системы, 2015 We have considered a questions associated with the analysis of the spectral characteristics of fiber Bragg gratings and periodic radio frequency in coaxial cable systems with uniform periodic structure containing a discrete phase shift.
O.G. Morozov, A.R. Nasybullin
doaj
Bandwidth-Variable and Wavelength-Tunable Waveguide Bragg Grating Filter
IEEE Photonics JournalWe propose and demonstrate a waveguide Bragg grating filter that is bandwidth-variable and wavelength-tunable. The filter is implemented using a pair of apodized waveguide Bragg gratings in silicon-on-insulator that are tuned thermally.
Luyao Xie, Lawrence R. Chen
doaj +1 more source
Double grating formation in anisotropic photorefractive crystals [PDF]
, 1992 Double gratings form in anisotropic photorefractive crystals when two plane waves intersecting inside the crystal have both extraordinary and ordinary wave components.
Li, Hsin-Yu, Psaltis, Demetri
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VCSEL with intra-cavity circular Bragg gratings for single-mode operation
AIP AdvancesIn this paper, we present the design and fabrication of a single-mode Vertical-Cavity Surface-Emitting Laser (VCSEL) incorporating circular Bragg gratings (CBGs).
Shanting Hu +5 more
doaj +1 more source
Bragg coaxial microwave structure in the sensor system
Физика волновых процессов и радиотехнические системы, 2014 The paper discusses the Bragg microwave structures on the coaxial cable that are based on optical technology transfer by analogy with fiber Bragg gratings.
G.A. Morozov +4 more
doaj
Bio-Chemical Sensors Based on Excessively Tilted Fiber Grating
Photonic SensorsExcessively tilted fiber gratings (ExTFGs) are a type of special optical fiber grating device different from traditional fiber Bragg gratings, long period fiber gratings, and tilted fiber Bragg gratings.
Fudan Chen +3 more
doaj +1 more source
Planar waveguides can be written with a UV-laser into photosensitised silica to produce a wide range of optical devices. Careful modulation of two interfering beams allows Bragg gratings to be directly written into the channel.
Gates, J.C. +3 more
core +1 more source