Results 1 to 10 of about 21,473 (156)
Beam Wander Restrained by Nonlinearity of Femtosecond Laser Filament in Air [PDF]
Sensors, 2022 The filamentation process under atmospheric turbulence is critical to its remote-sensing application. The effects of turbulence intensity and location on the spatial distribution of femtosecond laser filaments in the air were studied.
Jiewei Guo +7 more
doaj +2 more sources
Beam Wandering in the Atmosphere: The Effect of Partial Coherence [PDF]
Physical Review E, 2007 The effect of a random phase screen on laser beam wander in a turbulent atmosphere is studied theoretically. The method of photon distribution function is used to describe the photon kinetics of both weak and strong turbulence.
A. A. Chumak +5 more
core +4 more sources
Link budget analysis of bi-directional LEO and GEO optical feeder links advancing the beam wander model’s accuracy [PDF]
Scientific ReportsThe telecommunications of the future rely on the concept of a three-dimensional architecture able to integrate terrestrial and non-terrestrial networks with the goal to ensure a reliable and high-speed connectivity to users located anywhere.
Carla Cantore +5 more
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Beam wander relieved orbital angular momentum communication in turbulent atmosphere using Bessel beams. [PDF]
Sci Rep, 2017 AbstractOptical beam wander is one of the most important issues for free-space optical (FSO) communication. We theoretically derive a beam wander model for Bessel beams propagating in turbulent atmosphere. The calculated beam wander of high order Bessel beams with different turbulence strengths are consistent with experimental measurements.
Yuan Y +6 more
europepmc +4 more sources
Atmosphere, 2022 It is accepted that there exists two kinds of atmospheric turbulence in the Earth’s aerosphere—Kolmogorov and non-Kolmogorov turbulence; therefore, it is important to research their combined impacts on laser-satellite communications.
Fazhi Wang +4 more
doaj +1 more source
AIP Advances, 2023 Fractional vortex beams have attracted increasing attention due to their complex yet intriguing physical properties, such as radial notch intensity distribution and higher degrees of modulation in orbital angular momentum.
Xiang Xu +5 more
doaj +1 more source
Frontiers in Physics, 2023 This study employs the power spectrum inversion method to generate the phase screens of atmospheric turbulence over the sea, the theoretical model of the vortex beam array emitted by a focusing system through anisotropic non-Kolmogorov maritime ...
Hong Yu +5 more
doaj +1 more source
Photonics, 2023 We use the extended Huygens–Fresnel integral to analyze the propagation properties of a class of partially coherent beams with Laguerre non-uniform coherence properties (called Laguerre non-uniformly correlated beams) in free space and in a turbulent ...
Yang Zhao +6 more
doaj +1 more source
Beam wander prediction with recurrent neural networks
Optics Express, 2023 Among the problems that prevent free-space optical communication systems from becoming a truly mainstream technology is beam wander, which is especially important for structured light beams since beam misalignment introduces additional crosstalk at the receiver.
Dmitrii Briantcev +4 more
openaire +3 more sources
Turbulence-induced persistence in laser beam wandering [PDF]
Optics Letters, 2015 We have experimentally confirmed the presence of long-memory correlations in the wandering of a thin Gaussian laser beam over a screen after propagating through a turbulent medium. A laboratory-controlled experiment was conducted in which coordinate fluctuations of the laser beam were recorded at a sufficiently high sampling rate for a wide range of ...
Zunino, Luciano José +3 more
openaire +5 more sources