Results 31 to 40 of about 184,725 (118)
Single- and double-vortex vector solitons in self-focusing nonlinear media [PDF]
, 2004 We study two-component spatial optical solitons carrying an angular momentum and propagating in a self-focusing saturable nonlinear medium. When one of the components is small, such vector solitons can be viewed as a self-trapped vortex beam that guides either the fundamental or first-order guided mode, and they are classified as single- and double ...
arxiv +1 more source
Observation of a Nonlocal Optical Vortex
Physical Review Letters, 2009 We report the observation of an optical vortex in the correlations of photons produced from spontaneous parametric down-conversion. The singularity appears in a nonlocal coordinate plane consisting of 1 degree of freedom of each photon.
R. M. Gomes +5 more
openaire +4 more sources
Spontaneous squeezing of a vortex in an optical lattice [PDF]
Physical Review A, 2004 8 pages, 3 figures, more details added, some new ...
Martikainen, J.-P., Stoof, H.T.C.
openaire +5 more sources
Stability of a Vortex in Spinor Bose-Einstein Condensate [PDF]
arXiv, 2001 We propose a method to create a vortex in BEC utilizing the spin degree of freedom. We consider the optical plug at the center of the vortex, which makes the vortex-creation process stable. We also investigate the instability of the halfway state to complete vortex state without the optical plug.
arxiv
Optical Vortex Beam Propagation in Turbulent Atmosphere [PDF]
arXiv, 2016 Propagation of optical vortex beamlet (OVB) in turbulent atmospheric environment is studied theoretically by normalized models. Our simulation shows that optical vortex beamlet is superior to traditional Gaussian beam in terms of diffraction behavior of long haul propagation.
arxiv
Optical vortex trajectories in an astigmatic and elliptical Gaussian beam [PDF]
South African Journal of Science, Vol 102, pp 601-605 (2006), 2006 An optical vortex, produced at one point in an optical beam, would propagate through an optical system to another point where the vortex can be used for some purpose. However, asymmetrical optical elements in such a system can cause astigmatism or at least distroy the rotational symmetry of the beam, which may affect the propagation of the vortex in an
arxiv
Optical vortex braiding with Bessel beams
Optics Letters, 2020 We propose the braiding of optical vortices in a laser beam with more than 2 π rotation by superposing Bessel modes with a plane wave. We experimentally demonstrate this by using a Bessel–Gaussian beam and a coaxial Gaussian, and we present measurements of three complete braids. The amount of braiding is fundamentally limited only
Andrew A. Voitiv +3 more
openaire +5 more sources
Fractional vortex Hilbert's Hotel [PDF]
arXiv, 2015 We demonstrate how the unusual mathematics of transfinite numbers, in particular a nearly perfect realization of Hilbert's famous hotel paradox, manifests in the propagation of light through fractional vortex plates. It is shown how a fractional vortex plate can be used, in principle, to create any number of "open rooms," i.e.
arxiv
Quasi-ideal dynamics of vortex solitons embedded in top-hat nonlinear Bessel beams [PDF]
arXiv, 2017 Nonlinear Bessel beams in self-defocusing media are found to be the natural, non-diffracting background where vortex solitons can be nested, interact and survive for propagation distances that are one order of magnitude larger than in the usual Gaussian or super-Gaussian backgrounds.
arxiv
Scintillations of optical vortex in randomly inhomogeneous medium [PDF]
arXiv, 2014 The comparative numerical and analytical analysis of scintillation indices of the vortex Laguerre-Gaussian beam and the non-vortex doughnut hole and Gaussian beams propagating in the randomly inhomogeneous atmosphere has been performed. It has been found that the dependence of the scintillation index at the axis of the optical vortex on the turbulence ...
arxiv