Open AccessOV-bearing modes with ℓ = 2 of twisted anisotropic optical fibres
Author(s) -
C N Alexeyev,
E. V. Barshak,
Dmitriy Vikulin,
B. P. Lapin,
M. A. Yavorsky
Publication year - 2020
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 - 10.1088/1742-6596/1697/1/012162
Subject(s) - anisotropy , azimuth , optical vortex , topological quantum number , optical fiber , physics , mode (computer interface) , charge (physics) , vortex , optics , stress (linguistics) , order (exchange) , optical anisotropy , materials science , classical mechanics , condensed matter physics , mechanics , quantum mechanics , linguistics , philosophy , finance , computer science , economics , operating system
We investigated the high-order mode structure of a weakly guiding twisted anisotropic optical fibre. An analytical solution of the vector wave equation for this case is presented. We obtained analytical expressions for the higher-order modes with an azimuthal number ℓ = 2 and their propagation constants of such a fibre, considering the mutual effect of linear anisotropy of fibre’s material, twisting, including torsional mechanical stress, and spin-orbital interaction. We showed that optical vortex beams with topological charge ±2 are the modes of the fibres considered.