Results 31 to 40 of about 1,705,952 (334)
Optics Express, 2021 Vortex beams carrying orbital angular momentum (OAM), which feature helical wavefronts, have been regarded as an alternative degree of freedom for free-space optical (FSO) communication systems.
Long Zhu +4 more
semanticscholar +1 more source
Компьютерная оптика, 2022 In this work, using the Rayleigh-Sommerfeld integral and the Berry formula, the topological charge (TC) of a Gaussian optical vortex with an initial fractional TC is calculated. It is shown that for different fractional parts of the TС, the beam contains
A.G. Nalimov, V.V. Kotlyar
doaj +1 more source
, 2021 In this paper, we use two methods to research the propagation characteristics of a Hypergeometric-Gaussian (HyGG) vortex beam under oceanic turbulence. One is numerical calculation based on the Rytov approximation theory, where the theoretical detection ...
Xinguang Wang, Le Wang, Shengmei Zhao
semanticscholar +1 more source
IEEE Access, 2020 In this paper, a chamfer distribution antenna array is designed to generate a deflecting circular-polarized vortex beam carrying orbital angular momentum (OAM) mode.
Jun Liang +4 more
doaj +1 more source
Reconstructing the Poynting vector skew angle and wave-front of optical vortex beams via two-channel moir\'e deflectometery [PDF]
, 2013 A novel approach based on the two-channel moir\'e deflectometry has been used to measure both wave-front and transverse component of the Poynting vector of an optical vortex beam. Generated vortex beam by the q-plate, an inhomogeneous liquid crystal cell,
Dashti, Mohsen +5 more
core +3 more sources
Vortex strength and beam propagation factor of fractional vortex beams
Optics Express, 2019 9 pages, 5 ...
Jisen Wen +4 more
openaire +3 more sources
Physical Essence of Propagable Fractional‐Strength Optical Vortices in Free Space
Advanced Photonics Research, 2023 Fractional‐order vector vortex beams (VVBs) have recently been demonstrated as new carriers of fractional‐strength optical vortices. However, the inherent mechanism of the new vortex beams, formed by the combination of both unstable states, to propagate ...
Xiaoyu Weng +10 more
doaj +1 more source
Frontiers in Physics, 2023 Helicity and topological charge are two important characteristic parameters for vortex beam applications, including optical communications, optical manipulation and material processing, etc.
Shibing Lin +13 more
doaj +1 more source
Vortex nucleation and evolution in parametric wave mixing [PDF]
, 1999 We predict a variety of new phenomena, that includes the spontaneous nucleation of multiple vortex twins, vortex rotation and drift, vortex-antivortex interaction and annihilation, and formation of quasi-aligned patterns of single-charge vortices.
Molina Terriza, Gabriel +1 more
core +1 more source
Microwave vortex beam launcher design [PDF]
IET Microwaves, Antennas & Propagation, 2018 A novel design for a vectorial vortex beam launcher in the microwave regime is devised. The beam is formed by launching a single guided transverse electric (TE) mode of a metallic circular waveguide into free‐space. Excitation is achieved by the mean of an inserted coaxial loop antenna.
Nedime Pelin M.H. Salem +2 more
openaire +2 more sources