Results 21 to 30 of about 1,035 (272)
Non-Diffracting Light Wave: Fundamentals and Biomedical Applications
Frontiers in Physics, 2021 The light propagation in the medium normally experiences diffraction, dispersion, and scattering. Studying the light propagation is a century-old problem as the photons may attenuate and wander.
Yu-Xuan Ren +4 more
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Photonics, 2023 Satellite laser communication can achieve high-speed, high-precision, and high-security broadband communication without being constrained by the electromagnetic spectrum, which has attracted attention.
Xuewen Jiang, Yi Wang, Wangyue Lu
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, 2007 Failure of the first-order Rytov approximation to properly predict the scintillation index of a large-aperture focused beam, or an uplink collimated (or focused) beam, has been discussed in several recent publications, which cite beam wander effects as ...
Andrews, L.C. +5 more
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International Journal of Technology, 2015 Beam wander and spatial noise that are modulated on optical propagation produce noise modulation in the signal spectral before being received by a Photodetector (PD). In order to suppress noise modulation in the signal spectral, we present an Optical
Ucuk Darusalam +2 more
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Ergodic Capacity Analysis of Satellite Communication Systems With SAG-FSO/SH-FSO/RF Transmission
IEEE Photonics Journal, 2022 Future non-terrestrial networks aim to achieve a throughput of Terabits/s. Therefore, free-space optical (FSO) communications have been adopted as a candidate solution due to their ability to achieve an extremely high data rate.
Ramy Samy +3 more
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Full-Duplex DF Relaying With Parallel Hybrid FSO/RF Transmissions
IEEE Open Journal of the Communications Society, 2021 The ever-increasing demands for higher data rates in telecommunications networks, along with the significant benefits offered by wireless communications, have pushed the technological developments to new frontiers. Free-space optical (FSO) communications
Michalis P. Ninos +3 more
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Beam wandering of femtosecond laser filament in air
Optics Express, 2015 The spatial wandering of a femtosecond laser filament caused by the filament heating effect in air has been studied. An empirical formula has also been derived from the classical Karman turbulence model, which determines quantitatively the displacement of the beam center as a function of the propagation distance and the effective turbulence structure ...
Jing, Yang +3 more
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Design, Testing and Performance Evaluation of Beam Positioning System for Free Space Optical Communication System [PDF]
Radioengineering, 2021 Beam wandering and the wavefront distortion are the significant sources for the power loss in Wireless Optical Communication (WOC). In this paper Full Factorial Design (FFD) and Back Propagation Neural Network (BPNN) controller based autonomous beam ...
T. Pasupathi, J. Arputha Vijaya Selvi
doaj
Propagation of Optical Coherence Vortex Lattices in Turbulent Atmosphere
Applied Sciences, 2018 Propagation properties in the turbulence atmosphere of the optical coherence vortex lattices (OCVLs) are explored by the recently developed convolution approach. The evolution of spectral density distribution, the normalized M 2 -factor, and the
Yan Huang +7 more
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Temporal statistics of the beam-wander contribution to scintillation in ground-to-satellite optical links [PDF]
, 2005 The beam-wander contribution to the scintillation in a ground-to-satellite free-space optical link is one of major importance. An analytical model, based on the duality between beam wander and angle-of-arrival fluctuations, is proposed for the temporal
Rodríguez Gómez, Alejandro Antonio +3 more
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