Binary diffractive optics for 3D-demultiplexing of OAM beams

We propose to use a combination of spiral Fresnel zone plates (SFZPs) and binary diffractive gratings in order to realize 3D-demultiplexing of vortex beams - laser beams having an orbital angular momentum (OAM). It is known that binary and blazed fork-shaped diffractive gratings are widely used for...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1124; no. 5; pp. 51015 - 51019
Main Authors Porfirev, A P, Fomchenkov, S A, Gridin, G E, Khonina, S N
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.12.2018
Subjects
Angular momentum
Demultiplexing
Diffractive optics
Electron beams
Fresnel zones
Laser beams
Zone plates
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Summary:We propose to use a combination of spiral Fresnel zone plates (SFZPs) and binary diffractive gratings in order to realize 3D-demultiplexing of vortex beams - laser beams having an orbital angular momentum (OAM). It is known that binary and blazed fork-shaped diffractive gratings are widely used for demultiplexing of OAM beams and their analysis. In contrast to the fork-shaped gratings, in the case of SFZPs the diffraction orders differ in their focus positions along the propagation axis. A combination of these two approaches allows us to perform the socalled 3D-demultiplexing of OAM beams.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1124/5/051015