Generation of optical vortices in non-PT-symmetric chiral-core optical fibers

2021 ◽  
Author(s):  
C. Alexeyev ◽  
Elena Barshak ◽  
Boris Lapin ◽  
Maxim Yavorsky
Keyword(s):  
Optical Fibers ◽  
Optical Vortices

scholarly journals Influence of attenuation on the generation of optical vortices in multihelicoidal optical fibers

2021 ◽  
Vol 2103 (1) ◽  
pp. 012149
Author(s):  
C N Alexeyev ◽  
S S Alieva ◽  
E V Barshak ◽  
B P Lapin ◽  
M A Yavorsky
Keyword(s):  
Optical Fibers ◽  
Fundamental Mode ◽  
Optical Vortex ◽  
Conversion Process ◽  
Exceptional Point ◽  
Optical Vortices ◽  
Attenuation Coefficients ◽  
Enhanced Sensitivity ◽  
Scalar Approximation ◽  
The Difference

Abstract In this paper we have studied influence of attenuation on conversion processes of the fundamental mode (FM) in multihelicoidal optical fibers (MHF) in the vicinity of the point of accidental spectrum degeneracy within the framework of the scalar approximation. To this end, we have obtained expressions for modes of the MHF, which consist of the FM and an optical vortex (OV), and shown that conversion of the FM into the OV takes place. The difference in the attenuation coefficients for the partial fields of MHF’s modes leads to deterioration in the conversion process even with an ideal system’s tuning. At sufficiently large values of attenuation coefficients the conversion of the incoming FM into the vortex vanishes. Also we have shown the presence of exceptional point (EP) in the spectra of modes of the MHF and demonstrated enhanced sensitivity of the fiber in the vicinity of the EP to perturbations.

scholarly journals Optical fibers as beam shapers: from Gaussian beams to optical vortices

2016 ◽  
Vol 41 (10) ◽  
pp. 2137 ◽  
Author(s):  
Rita S. Rodrigues Ribeiro ◽  
Pabitra Dahal ◽  
Ariel Guerreiro ◽  
Pedro Jorge ◽  
Jaime Viegas
Keyword(s):  
Optical Fibers ◽  
Gaussian Beams ◽  
Optical Vortices

Optical vortices and topological phase in strongly anisotropic coiled few-mode optical fibers

2007 ◽  
Vol 24 (10) ◽  
pp. 2666 ◽  
Author(s):  
Constantine N. Alexeyev ◽  
Boris A. Lapin ◽  
Maxim A. Yavorsky
Keyword(s):  
Optical Fibers ◽  
Optical Vortices ◽  
Topological Phase

Generation of optical vortices in spun multihelicoidal optical fibers

2012 ◽  
Vol 51 (25) ◽  
pp. 6125 ◽  
Author(s):  
Constantine N. Alexeyev
Keyword(s):  
Optical Fibers ◽  
Optical Vortices

Optical vortices in fiber

Nanophotonics ◽  
2013 ◽  
Vol 2 (5-6) ◽  
pp. 455-474 ◽  
Author(s):  
Siddharth Ramachandran ◽  
Poul Kristensen
Keyword(s):  
Angular Momentum ◽  
Optical Fibers ◽  
Orbital Angular Momentum ◽  
Optical Vortex ◽  
Optical Vortices ◽  
New Class ◽  
Phase Singularities ◽  
Vortex Beams ◽  
Exotic Beams

AbstractOptical vortex beams, possessing spatial polarization or phase singularities, have intriguing properties such as the ability to yield super-resolved spots under focussing, and the ability to carry orbital angular momentum that can impart torque to objects. In this review, we discuss the means by which optical fibers, hitherto considered unsuitable for stably supporting optical vortices, may be used to generate and propagate such exotic beams. We discuss the multitude of applications in which a new class of fibers that stably supports vortices may be used, and review recent experiments and demonstration conducted with such fibers.

scholarly journals Polarization and topological mode dispersion of optical vortices in circular optical fibers

2019 ◽  
Vol 43 (1) ◽  
pp. 25-34 ◽  
Author(s):  
E.V. Barshak ◽  
◽  
M.A. Yavorsky ◽  
D.V. Vikulin ◽  
B.P. Lapin ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Optical Vortices ◽  
Mode Dispersion

Propagation of optical vortices in the system of twisted anisotropic and multihelical optical fibers

2021 ◽  
Author(s):  
Constantine Alexeyev ◽  
Elena Barshak ◽  
Dmitriy Vikulin ◽  
Boris Lapin ◽  
Maxim Yavorsky
Keyword(s):  
Optical Fibers ◽  
Optical Vortices
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