Transformation of the orbital angular momentum of a beam with optical vortex in an astigmatic optical system
- 1 February 2002
- journal article
- Published by Pleiades Publishing Ltd in JETP Letters
- Vol. 75 (3) , 127-130
- https://doi.org/10.1134/1.1469497
Abstract
Double sign inversion of the topological charge of an optical vortex was predicted and observed experimentally for a beam focused by a cylindrical lens. Beam evolution after passing through the lens is analyzed by the decomposition of the orbital angular momentum into the “vortical” and “mechanical” components. Topological reactions in the beam wave resulting in the sign inversion of the optical vortex upon the intersection of the wave-front edge dislocation are considered.Keywords
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