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An optical vortex (also known as a photonic quantum vortex, screw dislocation or phase singularity) is a zero of an optical field; a point of zero intensity. The term is also used to describe a beam of light that has such a zero in it. The study of these phenomena is known as singular optics.
In the figure to the right, the first column shows the beam wavefront shape. The second column is the optical phase distribution in a beam cross-section, shown in false colors. The third column is the light intensity distribution in a beam cross-section (with a dark vortex core at the center).
the scalar optical vortex coronagraph based on a phase ramp directly etched in a dielectric material, like fused silica. [ 3 ] [ 4 ] the vector(ial) vortex coronagraph employs a mask that rotates the angle of polarization of photons, and ramping this angle of rotation has the same effect as ramping a phase-shift.
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In contrast to the work of Bozinovic et al., which used a custom optical fiber that had a "vortex" refractive-index profile, the work by G. Milione et al. and H. Huang et al. showed that OAM multiplexing could be used in commercially available optical fibers by using digital MIMO post-processing to correct for mode mixing within the fiber. This ...
Physical optics deal with aspects of optics which have to be described by wave phenomena. Subcategories This category has the following 3 subcategories, out of 3 total.
Vortex Bladeless, a Spanish company developing wind power generators; Vortex Optics, an American maker of optical equipment; Vortex ring toy, a toy that generates vortex rings; Air vortex cannon, a toy that releases doughnut-shaped air vortices; Vortex ring gun, an experimental non-lethal weapon for crowd control
Direct image of exoplanets around the star HR8799 using a vortex coronograph on a 1.5m portion of the Hale Telescope. A vortex coronagraph is a type of optical instrument for telescopes that blocks out the glare of bright objects (like stars) so that smaller objects near them can be seen. For example, extrasolar planets near their host star as ...