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Hybrid generation and analysis of vector vortex beams
Author(s) -
Sandra Mamani,
Ethan Bendau,
Jeff Secor,
Solyman Ashrafi,
Jiufeng Tu,
R. R. Alfano
Publication year - 2017
Publication title -
applied optics
Language(s) - English
Resource type - Journals
ISSN - 0003-6935
DOI - 10.1364/ao.56.002171
Subject(s) - physics , optics , angular momentum , vortex , optical vortex , polarization (electrochemistry) , light beam , orbital angular momentum of light , orbital angular momentum multiplexing , beam (structure) , angular momentum of light , cardinal point , total angular momentum quantum number , classical mechanics , angular momentum coupling , chemistry , thermodynamics
A method is described for generating optical vector vortex beams carrying superpositions of orbital angular momentum states by using a tandem application of a spatial light modulator with a vortex retarder. The vortex component has a spatially inhomogeneous phase front that can carry orbital angular momentum, and the vector nature is a spatially inhomogeneous state of polarization in the laser beam profile. The vector vortex beams are characterized experimentally by imaging the beams at points across the focal plane in an astigmatic system using a tilted lens. Mathematical analysis of the Gouy phase shows good agreement with the phase structure obtained in the experimental images. The polarization structure of the vector beam and the orbital angular momentum of the vortex beam are shown to be preserved.

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