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

scholarly journals Light Confinement with Structured Beams in Gold Nanoparticle Suspensions

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 221
Author(s):  
Argelia Balbuena Balbuena Ortega ◽  
Felix E. Torres-González ◽  
Valentin López López Gayou ◽  
Raul Delgado Delgado Macuil ◽  
Gaetano Assanto ◽  
...  
Keyword(s):  
Colloidal Suspension ◽  
Laser Wavelength ◽  
Gaussian Beams ◽  
Optical Vortices ◽  
Complex Structures ◽  
Plasmonic Resonance ◽  
Dark Solitons ◽  
Experimental Campaign ◽  
Nanoparticle Suspensions ◽  
Light Beams

We carry out an experimental campaign to investigate the nonlinear self-defocusing propagation of singular light beams with various complex structures of phase and intensity in a colloidal suspension of gold nanoparticles with a plasmonic resonance near the laser wavelength (532nm). Studying optical vortices embedded in Gaussian beams, Bessel vortices and Bessel-cosine (necklace) beams, we gather evidence that while intense vortices turn into two-dimensional dark solitons, all structured wavepackets are able to guide a weak Gaussian probe of different wavelength (632.8 nm) along the dark core. The probe confinement also depends on the topological charge of the singular pump.

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.

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

Propagation of ring Airy Gaussian beams with optical vortices through anisotropic non-Kolmogorov turbulence

2017 ◽  
Vol 387 ◽  
pp. 157-165 ◽  
Author(s):  
Dong Zhi ◽  
Rumao Tao ◽  
Pu Zhou ◽  
Yanxing Ma ◽  
Wuming Wu ◽  
...  
Keyword(s):  
Gaussian Beams ◽  
Optical Vortices ◽  
Kolmogorov Turbulence

scholarly journals Propagation of Bessel-Gaussian beams with optical vortices in turbulent atmosphere

2008 ◽  
Vol 16 (26) ◽  
pp. 21315 ◽  
Author(s):  
Kaicheng Zhu ◽  
Guoquan Zhou ◽  
Xuguang Li ◽  
Xiaojuan Zheng ◽  
Huiqin Tang
Keyword(s):  
Turbulent Atmosphere ◽  
Gaussian Beams ◽  
Optical Vortices

Nonparaxial gaussian beams: 3. Optical vortices

2001 ◽  
Vol 27 (6) ◽  
pp. 525-528 ◽  
Author(s):  
A. V. Volyar ◽  
V. G. Shvedov ◽  
T. A. Fadeeva ◽  
E. A. Konshu
Keyword(s):  
Gaussian Beams ◽  
Optical Vortices

scholarly journals Vector erf-Gaussian beams: fractional optical vortices and asymmetric TE and TM modes

2012 ◽  
Vol 37 (9) ◽  
pp. 1397 ◽  
Author(s):  
T. Fadeyeva ◽  
C. Alexeyev ◽  
A. Rubass ◽  
A. Volyar
Keyword(s):  
Gaussian Beams ◽  
Optical Vortices ◽  
Te And Tm Modes
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