Orbital angular momentum of laser beam in the turbulent medium: asymptotic estimates and numerical simulation

2015 ◽  
Author(s):  
V. P. Aksenov ◽  
V. V. Kolosov ◽  
Ch. E. Pogutsa ◽  
G. A. Filimonov
Keyword(s):  
Numerical Simulation ◽  
Angular Momentum ◽  
Laser Beam ◽  
Orbital Angular Momentum ◽  
Turbulent Medium ◽  
Asymptotic Estimates

scholarly journals VORTEX-FREE LASER BEAM WITH AN ORBITAL ANGULAR MOMENTUM

2017 ◽  
Vol 41 (4) ◽  
pp. 573-576 ◽  
Author(s):  
V. V. Kotlyar ◽  
A. A. Kovalev
Keyword(s):  
Angular Momentum ◽  
Laser Beam ◽  
Orbital Angular Momentum

scholarly journals Plasma solenoid driven by a laser beam carrying an orbital angular momentum

2018 ◽  
Vol 98 (3) ◽  
Author(s):  
R. Nuter ◽  
Ph. Korneev ◽  
I. Thiele ◽  
V. Tikhonchuk
Keyword(s):  
Angular Momentum ◽  
Laser Beam ◽  
Orbital Angular Momentum

scholarly journals A study on the effects and visibility of low-order aberrations on laser beams with orbital angular momentum

2019 ◽  
Vol 125 (11) ◽  
Author(s):  
Jonas B. Ohland ◽  
Udo Eisenbarth ◽  
Markus Roth ◽  
Vincent Bagnoud
Keyword(s):  
Angular Momentum ◽  
Laser Beam ◽  
Orbital Angular Momentum ◽  
Intensity Distribution ◽  
Laser Beams ◽  
Far Field ◽  
Wavefront Aberrations ◽  
Tolerance Criteria ◽  
Selection Of ◽  
Low Order

Abstract Laguerre–Gaussian-like laser beams have been proposed for driving experiments with high-intensity lasers. They carry orbital angular momentum and exhibit a ring-shaped intensity distribution in the far field which make them particularly attractive for various applications. We show experimentally and numerically that this donut-like shape is extremely sensitive to off-axis wavefront deformations. To support our claim, we generate a Laguerre–Gaussian-like laser beam and apply a selection of common low-order wavefront aberrations. We investigate the visibility of those wavefront deformations in the far field. Under use of established tolerance criteria, we determine the thresholds for the applied aberration and compare the findings with simulations for verification.

scholarly journals Optical Orbital Angular Momentum Demultiplexing and Channel Equalization by Using Equalizing Dammann Vortex Grating

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
Mingyang Su ◽  
Junmin Liu ◽  
Yanliang He ◽  
Shuqing Chen ◽  
Ying Li
Keyword(s):  
Numerical Simulation ◽  
Angular Momentum ◽  
Light Intensity ◽  
Diffraction Efficiency ◽  
Orbital Angular Momentum ◽  
Bit Error Rate ◽  
Error Rate ◽  
Channel Equalization ◽  
Grating Structure

A novel equalizing Dammann vortex grating (EDVG) is proposed as orbital angular momentum (OAM) multiplexer to realize OAM signal demultiplexing and channel equalization. The EDVG is designed by suppressing odd diffraction orders and adjusting the grating structure. The light intensity of diffraction is subsequently distributed evenly in the diffraction orders, and the total diffraction efficiency can be improved from 53.22% to 82%. By using the EDVG, OAM demultiplexing and channel equalization can be realized. Numerical simulation shows that the bit error rate (BER) of each OAM channel can decrease to 10-4 when the bit SNR is 22 dB, and the intensity is distributed over the necessary order of diffraction evenly.

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