dorsal/arxiv
View SchemaOptical vortex trajectories in an astigmatic and elliptical Gaussian beam
| Authors | Filippus S. Roux |
|---|---|
| Categories | |
| ArXiv ID | physics/0602069 |
| URL | https://arxiv.org/abs/physics/0602069 |
| Journal | South African Journal of Science, Vol 102, pp 601-605 (2006) |
Abstract
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 undesirable way. While an optical vortex in a rotationally symmetric, stigmatic Gaussian beam retains its initial morphology for as far as it propagates, the morphology of an optical vortex in an asymmetric or astigmatic Gaussian beam changes. The vortex can even be replaced by another with the opposite topological charge. We consider the behavior of single noncanonical vortices propagating in Gaussian beams that are asymmetric and/or astigmatic. General expressions for the vortex trajectories are provided. The locations of the flip planes and the evolution of the anisotropy of the vortex are considered for different non-ideal situations.
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"abstract": "An optical vortex, produced at one point in an optical beam, would propagate\nthrough an optical system to another point where the vortex can be used for\nsome purpose. However, asymmetrical optical elements in such a system can cause\nastigmatism or at least distroy the rotational symmetry of the beam, which may\naffect the propagation of the vortex in an undesirable way. While an optical\nvortex in a rotationally symmetric, stigmatic Gaussian beam retains its initial\nmorphology for as far as it propagates, the morphology of an optical vortex in\nan asymmetric or astigmatic Gaussian beam changes. The vortex can even be\nreplaced by another with the opposite topological charge. We consider the\nbehavior of single noncanonical vortices propagating in Gaussian beams that are\nasymmetric and/or astigmatic. General expressions for the vortex trajectories\nare provided. The locations of the flip planes and the evolution of the\nanisotropy of the vortex are considered for different non-ideal situations.",
"arxiv_id": "physics/0602069",
"authors": [
"Filippus S. Roux"
],
"categories": [
"physics.optics"
],
"journal_ref": "South African Journal of Science, Vol 102, pp 601-605 (2006)",
"title": "Optical vortex trajectories in an astigmatic and elliptical Gaussian beam",
"url": "https://arxiv.org/abs/physics/0602069"
},
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