Cited by 12Orbital Angular Momentum in OpticsPhotonic Crystal and Fiber OpticsMetamaterials and Metasurfaces Applications

The effect of spin–orbit coupling on the structure of the stopband in helical-core optical fibres

Alexeyev, Constantine N, Lapin, Boris P, Yavorsky, Maxim A·2008·Journal of Optics A: Pure and Applied Optics

Abstract

We study the influence of spin–orbit interaction (SOI) on the mode coupling in few-mode helical-core optical fibres with up to a wavelength order values of the helix pitch. Within the framework of a full-vectorial approach, we solve the vector waveguide equation and show that in such fibres at certain values of pitch the fundamental modes strongly couple with l = 1 optical vortices (OVs). We study the spectra of the coupled modes and demonstrate that they feature the presence of forbidden spectrum zones. Within the mutual bandgap the only forward-propagating non-damping modes are represented by two circularly polarized OVs with opposite circular polarization and positive topological charge. We emphasize that within the spectrum gap the fibre maintains the propagation of a solitary circularly polarized OV. We also study the influence of the SOI on the structure of the forbidden zones and show that the presence of this interaction shifts the position of the bandgaps. For fibres with large enough effective curvature radii of the core's helix, the effect of the SOI can lead to the disappearance of the mutual bandgap, thus destroying the fibre's ability to transmit a solitary OV.

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Crossref · 10.1088/1464-4258/10/8/085006

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33 of 33 references verified0 citation errors · 0 not checkable

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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., Lapin, B. P., & Yavorsky, M. A.
Venue
Journal of Optics A: Pure and Applied Optics
Published
2008-07-31
Volume
10
Issue
8
Pages
085006
ISSN
  • 1464-4258 (ISSN-L)
  • 1741-3567
OpenAlex
W2001023355
Cited by
12
References
33
Citations by year
2025: 1 · 2023: 1 · 2019: 3 · 2013: 1 · 2012: 3
FWCI
0.58
Type
journal article
Language
en
Open access
closed
Locations
Journal of Optics A Pure and Applied Optics (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
spin-orbit coupling, optical vortices, mode coupling, band gap, circularly polarized light, topological charge, few-mode fiber, helical pitch

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