Journal
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
Volume 6, Issue 5, Pages S166-S169Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1464-4258/6/5/003
Keywords
optical vortices; topological charge; singular optics
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We present an elaborated holographic technique for synthesis of optical beams possessing optical vortices with fractional topological charge. The technique is based on the production of sub-harmonic diffraction orders. The diffraction orders corresponding to the fundamental period have embedded vortices with integer topological charge and sub-harmonic diffraction orders have optical vortices with fractional topological charge. An analytical approach for charge-1/2 optical-vortex beam structure description is presented.
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