Cited by 81Orbital Angular Momentum in OpticsPhotonic Crystal and Fiber OpticsMetamaterials and Metasurfaces Applications

Generation and conversion of optical vortices in long-period helical core optical fibers

Alexeyev, Constantine N., Yavorsky, Maxim A.·2008·Physical Review A

Abstract

We theoretically study generation and conversion of optical vortices (OVs) in long-period helical core fibers (HCFs) produced by drawing from a perform with an eccentric core. Solving scalar waveguide equation in the helical coordinates we demonstrate that in such fibers topologically induced corrections to scalar propagation constants lead to convergence of spectral curves. At their intersection points a resonance coupling takes place between the fundamental and the vortex modes, as well as the coupling between OVs, whose topological charges differ by unity. This coupling leads to energy exchange between the coupled modes, which is manifested either in conversion of the input fundamental mode into an OV or transformation of an OV into the OV with higher by 1 (or lower, depending on core's helicity) value of the topological charge. This effect can be used for creation of all-fiber generators of singular beams from regular input beams. We also study effect of ellipticity of the core's form on transformation properties of HCFs and show that this leads to splitting of resonance fiber's parameters, at which conversion of left and right circularly polarized input regular beams into OVs occurs. We prove that in long-period HCFs one can neglect this effect due to reduction of polarization mode dispersion in twisted fibers.

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Crossref · 10.1103/physreva.78.043828

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  • The spin-orbit interaction of light and spin-to-orbit conversion of angular momentum, which can be associated with the spin Hall effect, occurs upon scattering of polarized plane waves on various non-planar objects, such as lenses or small scatterers, or in inhomogeneous anisotropic media.

    “Finally, the spin-orbit interaction of light and spin-to-orbit conversion of the angular momentum (which can be associated with the spin Hall effect) occurs upon the scattering of polarized plane waves on various non-planar objects, such as lenses or small scatterers, or in inhomogeneous anisotropic media [67,145 -152].”

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Authors
Alexeyev, C. N., & Yavorsky, M. A.
Affiliations
Taurida National V.I. Vernadsky University (UA)
Venue
Physical Review A
Published
2008-10-30
Volume
78
Issue
4
ISSN
  • 0556-2791 (ISSN-L)
  • 1050-2947
  • 1094-1622
OpenAlex
W2045093187
Cited by
81
References
70
Citations by year
2026: 5 · 2025: 6 · 2024: 7 · 2023: 5 · 2022: 6 · 2021: 9 · 2020: 1 · 2019: 8 · 2018: 6 · 2017: 3 · 2016: 5 · 2015: 4 · 2014: 4 · 2013: 6 · 2012: 2
FWCI
0.77
Type
journal article
Language
en
Open access
closed
Locations
Physical Review A (publishedVersion)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Orbital Angular Momentum in Optics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Photonic Crystal and Fiber Optics
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Metamaterials and Metasurfaces Applications
Keywords
optical vortices, vortex formation, topological charge, resonant coupling, polarization mode dispersion, circularly polarized light, singular beams

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