Results 31 to 40 of about 20,118 (299)
Physical-Layer Security in Free-Space Optical Communications
IEEE Photonics Journal, 2015 The communication between two legitimate peers in the presence of an external eavesdropper is studied from a physical-layer security perspective in the context of free-space optical (FSO) communications.
F. Javier Lopez-Martinez +2 more
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Sensors, 2023 Free-space optical (FSO) communication has been studied for next-generation network systems. Because an FSO system establishes point-to-point communication links, maintaining alignment among the transceivers is a critical challenge.
Hye-Min Park +2 more
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New Journal of Physics, 2022 Satellite communications at radio frequencies can experience a ‘blackout’ period following the atmospheric detonation of a nuclear weapon. The wavelengths used for free-space quantum communications will not incur the same ‘blackout’ effects from a ...
Brandon A Wilson +4 more
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Enforcing Energy Balance in Coherently Superimposed Optical Vortices
IEEE Photonics Journal, 2018 The generation of optical beams with multiple, mutually coherent orbital-angular-momentum (OAM) modes using phase gratings is analyzed from the perspective of energy distribution and radial mode composition.
Jaime Cisternas +2 more
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Fading testbed for free-space optical communications [PDF]
SPIE Proceedings, 2016 Free-space optical (FSO) communication is a very attractive technology offering very high throughput without spectral regulation constraints, yet allowing small antennas (telescopes) and tap-proof communication. However, the transmitted signal has to travel through the atmosphere where it gets influenced by atmospheric turbulence, causing scintillation
Amita Shrestha +5 more
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CTA Telescopes as Deep-Space Lasercom Ground Receivers
IEEE Photonics Journal, 2015 The amount of scientific data to be transmitted from deep-space probes is very limited due to radio-frequency (RF) communications constraints. Free-space optical communication can alleviate this bottleneck, increasing data rate while reducing weight ...
Alberto Carrasco-Casado +2 more
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Photonics, 2022 Ultraviolet (UV) communication is considered an effective complement to traditional wireless communication. However, the scattering models of existing non-line-of-sight (NLOS) UV, which are complex, are difficult to combine with the test.
Axin Du +5 more
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Free-space optical delay line using space-time wave packets
Nature Communications, 2020 Delay lines are a critical part of future optical communications. Here, the authors create a delay line in free space by tuning the group velocities of multiple inline space-time wavepackets to introduce different delays.
Murat Yessenov +3 more
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Analysis of Free-Space Optics Development
Metrology and Measurement Systems, 2017 The article presents state of work in technology of free-space optical communications (Free Space Optics − FSO). Both commercially available optical data links and their further development are described.
Mikołajczyk Janusz +7 more
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Modelling Investigation of Atmospheric Turbulence-Induced Beam Deviation for LEO/GEO FSO Communication Link [PDF]
EPJ Web of ConferencesThe uplink analytical simulation scenario of atmospheric turbulence-induced beam deviation can give the insight needed to understand and create the mitigation techniques that could support novel applications in the fields of free-space optical ...
Al-Juboori Haider
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