Results 251 to 260 of about 410,028 (288)

Spatial intensity correlations of a vortex beam and a perfect optical vortex beam

Journal of the Optical Society of America A, 2019
We present a model based on the Fresnel diffraction scheme for the spatial coherence function of random fields created by scattering optical vortex and perfect vortex beams. By using the spatial coherence function we showed analytically, numerically, and experimentally the dependence and independence of the speckle size of an optical vortex and perfect
Cristian Hernando, Acevedo, Yezid, Torres-Moreno, Aristide, Dogariu   +2 more
openaire   +2 more sources

Non-coaxial superposition of vector vortex beams

Applied Optics, 2016
Vector vortex beams are classified into four types depending upon spatial variation in their polarization vector.We have generated all four of these types of vector vortex beams by using a modified polarization Sagnac interferometer with a vortex lens ...
Pravin Vaity, A Aadhi, Salla Gangi Reddy
exaly   +2 more sources

Beam spreading of vortex beams propagating in turbulent atmosphere

Applied Optics, 2012
We present some results obtained by numerical modeling of the propagation of vortex beams LG(0l) through a randomly inhomogeneous medium. The vortex beams are the lower order Laguerre-Gaussian modes. Such beams, if propagated under conditions of weak turbulence, also experience distortions, like a Gaussian beam.
Vladimir P Lukin
exaly   +3 more sources

Polarization basis for vortex beams

Journal of the Optical Society of America A, 2001
Attention is called to a polarization basis formed by four Jones vectors that is reducible to two basic structures. In these states the field is linearly polarized at any point, but the polarization direction changes with the angular coordinate. Very simple equations hold for the field lines of these basis vectors.
openaire   +2 more sources

Generation and characteristics of an anomalous Airy vortex beam from a Lommel vortex beam

Physica Scripta, 2023
Abstract A practical method for generating an anomalous Airy vortex beam is proposed, and characteristics of this novel kind beam are investigated. Results show that orbital angular momentum (OAM) quantum number n could be used to modulate the profiles of vortex rings, asymmetric parameter c would cause the beam rotation and phase ...
Yuanhuang Qiu, Zhirong Liu
openaire   +1 more source

Soliton algebra by vortex-beam splitting

Optics Letters, 2001
We experimentally demonstrate the possibility of breaking up intense vortex light beams into stable and controllable sets of parametric solitons. We report observations performed in seeded second-harmonic generation, but the scheme can be extended to all parametric processes.
Minardi, Stefano, Molina Terriza, Gabriel, Di Trapani, Paolo, Pérez Torres, Juan, Torner Sabata, Lluís   +4 more
openaire   +4 more sources

Properties of circularly polarized vortex beams

Optics Letters, 2006
The properties of circularly polarized vortex beams in cylindrical polarization bases are studied. A circularly polarized vortex beam is decomposed into radial and azimuthal polarization. With the proper combination of vortex charge and the handedness of the circular polarization, a focal field with an extremely strong longitudinal component as well as
Qiwen Zhan
exaly   +3 more sources

Atom vortex beams

Physical Review A, 2014
The concept that all de Broglie particles can form vortex beams is analyzed for neutral atoms. It is shown how atoms diffracted from a suitably constructed optical mask configuration employing light of $l$ units of orbital angular momentum and at far-off resonance with an atomic transition can lead to the generation of a discrete set of atom vortex ...
V. E. Lembessis, D. Ellinas, M. Babiker, O. Al-Dossary   +3 more
openaire   +1 more source

Generation of perfect vectorial vortex beams

Optics Letters, 2016
We propose the concept of perfect vectorial vortex beams (VVBs), which not merely have intensity profile independent of the polarization order and the topological charge of spiral phase, but also have stable intensity profile and state of polarization (SoP) upon propagation. Utilizing a Sagnac interferometer, we approximately generate perfect VVBs with
Peng, Li, Yi, Zhang, Sheng, Liu, Chaojie, Ma, Lei, Han, Huachao, Cheng, Jianlin, Zhao   +6 more
openaire   +2 more sources

Revealing the radial modes in vortex beams

Applied Optics, 2016
Light beams that carry orbital angular momentum are often approximated by modulating an initial beam, usually Gaussian, with an azimuthal phase variation to create a vortex beam. Such vortex beams are well defined azimuthally, but the radial profile is neglected in this generation approach.
Bereneice, Sephton, Angela, Dudley, Andrew, Forbes   +2 more
openaire   +2 more sources