Creation of a single and quadrupole optical vortices by light focused by a two-component crystal-optics element: prediction of an octupole vortex structure

V. Yu. Osipov; A. A. Buznikov

doi:10.1117/12.885477

9 April 2011 Creation of a single and quadrupole optical vortices by light focused by a two-component crystal-optics element: prediction of an octupole vortex structure

V. Yu. Osipov, A. A. Buznikov

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Proceedings Volume 7822, Laser Optics 2010; 78220G (2011) https://doi.org/10.1117/12.885477
Event: Laser Optics 2010, 2010, St. Petersburg, Russian Federation

Abstract

In the neighborhood of the cusp of the "double" caustic produced by the y- polarized convergent eo- and ee- beams, a single isolated optical vortex was found to exist. The observed single vortices are formed only under four strictly defined angular orientations of the incident collimated light beam relative to the entrance face of two-component crystal-optics element (TCE). As the direction of propagation of a collimated laser beam striking normally the TCE is reversed, a distinct localized quadrupole optical vortex consisting of four closely spaced vortices with pairwise-opposite topological charges -1, +1, +1, and -1 forms close to the cusp of this caustic (diffraction catastrophe). The analysis of quadrupole vortex formed by TCE was done for comparative purpose because both vortex fields are formed near the corresponding paraxial foci by the same crystal-optical element.

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V. Yu. Osipov and A. A. Buznikov "Creation of a single and quadrupole optical vortices by light focused by a two-component crystal-optics element: prediction of an octupole vortex structure", Proc. SPIE 7822, Laser Optics 2010, 78220G (9 April 2011); https://doi.org/10.1117/12.885477

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KEYWORDS

Optical vortices

Crystals

Collimation

Diffraction

Optical components

Wavefronts

Monochromatic aberrations

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