Results 11 to 20 of about 657 (221)
天地一体化信息网络, 2021 The eff ect of beam center shift on the performance of satellite chaos laser safety communication system in spaceintegrated-ground information network was studied, the bit error rate (BER) formulae with external and internal mismatch caused by beam ...
Mi LI +5 more
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A Survey of Structure of Atmospheric Turbulence in Atmosphere and Related Turbulent Effects
Atmosphere, 2021 The Earth’s atmosphere is the living environment in which we live and cannot escape. Atmospheric turbulence is a typical random inhomogeneous medium, which causes random fluctuations of both the amplitude and phase of optical wave propagating through it.
Fazhi Wang +4 more
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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
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IEEE Photonics Journal, 2018 The effects of asymmetry atmospheric eddies on the beam spreading and wander of Bessel–Gaussian (BG) beams in anisotropic turbulence are studied. Results show that turbulence anisotropy leads to the declines in both beam spreading and wander of BG
Mingjian Cheng +5 more
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Are FRB Wandering Narrow Beams? [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2016 It is generally assumed that the sources of Fast Radio Bursts radiate roughly isotropically, so that the observed low duty cycle of any individual source indicates a similar low duty cycle of its radio-frequency emission. An alternative hypothesis is that the radiative duty cycle is ${\cal O}(1)$, but that the radiation is emitted in a beam with a ...
openaire +3 more sources
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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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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