Transverse energy redistribution upon edge diffraction of a paraxial laser beam with optical vortex

2013 ◽  
Author(s):  
Aleksandr Bekshaev ◽  
Kadhim Ameen Mohammed
Keyword(s):  
Laser Beam ◽  
Transverse Energy ◽  
Optical Vortex ◽  
Energy Redistribution ◽  
Edge Diffraction

Transverse energy circulation and the edge diffraction of an optical vortex beam

2014 ◽  
Vol 53 (10) ◽  
pp. B27 ◽  
Author(s):  
Aleksandr Ya. Bekshaev ◽  
Kadhim A. Mohammed ◽  
Ivan A. Kurka
Keyword(s):  
Transverse Energy ◽  
Optical Vortex ◽  
Vortex Beam ◽  
Edge Diffraction

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

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.

Process Analysis of Laser Beam Cladding

2000 ◽  
Vol 123 (4) ◽  
pp. 609-614 ◽  
Author(s):  
A. F. H. Kaplan ◽  
G. Groboth
Keyword(s):  
Laser Beam ◽  
Process Model ◽  
Process Analysis ◽  
Single Step ◽  
Balance Equations ◽  
Energy Redistribution ◽  
Geometrical Properties ◽  
Clad Layer ◽  
Powder Mass ◽  
Balance Equations Of Energy

The technology of laser beam cladding of metals by single-step powder delivery is analyzed with a process model which is based on balance equations of energy and mass. Effects like powder heating, clad layer formation, substrate dilution and overlapping of tracks are discussed in dependence of the process parameters. In particular, the powder catchment efficiency and the beam energy redistribution in the material can be optimized by the powder mass flow rate and by the geometrical properties of the beam and of the powder jet.

Edge diffraction of optical-vortex beams formed by means of the fork hologram

2015 ◽  
Author(s):  
Aleksey Chernykh ◽  
Aleksandr Bekshaev ◽  
Anna Khoroshun ◽  
Lidiya Mikhaylovskaya ◽  
Aleksandr Akhmerov ◽  
...  
Keyword(s):  
Optical Vortex ◽  
Edge Diffraction ◽  
Vortex Beams

scholarly journals Gaussian laser beam transformation into an optical vortex beam by helical lens

2015 ◽  
Vol 63 (2) ◽  
pp. 164-176 ◽  
Author(s):  
Ljiljana Janicijevic ◽  
Suzana Topuzoski
Keyword(s):  
Laser Beam ◽  
Optical Vortex ◽  
Vortex Beam ◽  
Gaussian Laser Beam

scholarly journals Linear to circular polarization conversion in the sharp focus of an optical vortex

2021 ◽  
Vol 45 (1) ◽  
pp. 13-18
Author(s):  
A.G. Nalimov ◽  
S.S. Stafeev
Keyword(s):  
Energy Flow ◽  
Transverse Energy ◽  
Optical Axis ◽  
Center Of Mass ◽  
Polarization Vector ◽  
Optical Vortex ◽  
Spin Orbital ◽  
Theoretical Predictions ◽  
Linearly Polarized ◽  
The Right

We have shown that when sharply focusing a linearly polarized optical vortex with topological charge 2, in the near-axis region of the focal plane, not only does a reverse energy flow (the negative on-axis projection of the Poynting vector) occur, but also the right-handed circular polariza-tion of light. Moreover, due to spin-orbital angular momentum conversion, the on-axis polarization vector and the transverse energy flow rotate around the optical axis in the same direction (counter-clockwise). If an absorbing spherical microparticle is put in the focus on the optical axis, it will rotate around the axis and around its center of mass counterclockwise. Numerical simulation results confirms the theoretical predictions.

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