Open AccessDestruction of the orbital angular momentum in combined singular beams
Author(s) -
Yana Akimova,
Mikhail Bretsko
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1400/6/066006
Subject(s) - angular momentum , grating , physics , perturbation (astronomy) , holography , quantum electrodynamics , lattice (music) , topological quantum number , optics , angular momentum of light , singular perturbation , angular momentum coupling , quantum mechanics , total angular momentum quantum number , acoustics
This paper shows the dependence of the orbital angular momentum (OAM) of combined singular beams on the magnitude of the local perturbation in the holographic grating. In the absence of a perturbation of the holographic grating, the OAM acquires a maximum value numerically equal to the topological charge of the singular beam. With weak disturbances of a regular holographic grating, dips in the orbital moment appear. The depth of the dips increases rapidly with increasing disturbance. It is shown that even a weak perturbation of the lattice leads to a sharp increase in the contribution of partial beams with other topological charges. The reliability of the results obtained confirms the high degree of correlation of the intensity distribution of the original and reconstructed combined beams.