scholarly journals Laser Beam Positioning by Using a Broken-Down Optical Vortex Marker

2021 ◽  
Vol 11 (16) ◽  
pp. 7677
Author(s):  
Ewa Frączek ◽  
Wojciech Frączek ◽  
Agnieszka Popiołek-Masajada
Keyword(s):  
Laser Beam ◽  
Open Space ◽  
Optical Vortex ◽  
Center Of Gravity ◽  
High Order ◽  
Optical Vortices

We propose the use of high-order optical vortices as markers in the positioning of a laser beam. The broken optical vortices are arranged in constellations. The center of gravity of these constellations makes it possible to position the beam carrying information encoded in the optical vortices. This paper describes three positioning methods using both intensity and phase maps. The methods described were tested in experiments performed in a laboratory and an open space.

scholarly journals Optical Vortices: 3D Optical Vortex Lattices (Ann. Phys. 7/2021)

2021 ◽  
Vol 533 (7) ◽  
pp. 2170023
Author(s):  
Denis A. Ikonnikov ◽  
Sergey A. Myslivets ◽  
Vasily G. Arkhipkin ◽  
Andrey M. Vyunishev
Keyword(s):  
Optical Vortex ◽  
Optical Vortices ◽  
Vortex Lattices

High-order optical vortex generation in a few-mode fiber via cascaded acoustically driven vector mode conversion

2016 ◽  
Vol 41 (21) ◽  
pp. 5082 ◽  
Author(s):  
Wending Zhang ◽  
Ligang Huang ◽  
Keyan Wei ◽  
Peng Li ◽  
Biqiang Jiang ◽  
...  
Keyword(s):  
Mode Conversion ◽  
Optical Vortex ◽  
High Order ◽  
Vortex Generation ◽  
Vector Mode

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.

Aberration correction in holographic optical tweezers using a high-order optical vortex: publisher’s note

2018 ◽  
Vol 57 (17) ◽  
pp. 4857
Author(s):  
Yansheng Liang ◽  
Yanan Cai ◽  
Zhaojun Wang ◽  
Ming Lei ◽  
Zhiliang Cao ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Optical Vortex ◽  
High Order ◽  
Aberration Correction ◽  
Holographic Optical Tweezers

Generation of super-high-order petal-like laser beam using Theon-sieve resonator

2020 ◽  
Vol 18 (4) ◽  
pp. 041404
Author(s):  
Xianghe Guan ◽  
Junyong Zhang ◽  
Yanli Zhang ◽  
Jianqiang Zhu
Keyword(s):  
Laser Beam ◽  
High Order

scholarly journals Strongly Focused Circularly Polarized Optical Vortices Regulated by a Fractal Conical Lens

2019 ◽  
Vol 10 (1) ◽  
pp. 28
Author(s):  
Zhirong Liu ◽  
Kelin Huang ◽  
Anlian Yang ◽  
Xun Wang ◽  
Philip H. Jones
Keyword(s):  
Angular Momentum ◽  
Optical Tweezers ◽  
Numerical Aperture ◽  
Optical Element ◽  
Optical Vortex ◽  
Optical Vortices ◽  
Circularly Polarized ◽  
Strong Focusing ◽  
New Type ◽  
Vortex Beams

In this paper, a recently-proposed pure-phase optical element, the fractal conical lens (FCL), is introduced for the regulation of strongly-focused circularly-polarized optical vortices in a high numerical aperture (NA) optical system. Strong focusing characteristics of circularly polarized optical vortices through a high NA system in cases with and without a FCL are investigated comparatively. Moreover, the conversion between spin angular momentum (SAM) and orbital angular momentum (OAM) of the focused optical vortex in the focal vicinity is also analyzed. Results revealed that a FCL of different stage S could significantly regulate the distributions of tight focusing intensity and angular momentum of the circularly polarized optical vortex. The interesting results obtained here may be advantageous when using a FCL to shape vortex beams or utilizing circularly polarized vortex beams to exploit new-type optical tweezers.

Optical vortex closes itself in a laser beam after passing through a Gaussian lens

1999 ◽  
Author(s):  
Lyubov V. Kreminskaya ◽  
R. Amezquita ◽  
Vladimir B. Markov ◽  
Freddy A. Monroy ◽  
G. Arenas ◽  
...  
Keyword(s):  
Laser Beam ◽  
Optical Vortex
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