Results 21 to 30 of about 246,737 (191)
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
High Speed Visible Light Communication Using Blue GaN Laser Diodes [PDF]
, 2016 GaN-based laser diodes have been developed over the last 20 years making them desirable for many security and defence applications, in particular, free space laser communications.
Czernecki, R. +15 more
core +2 more sources
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
doaj +1 more source
Route diversity analyses for free-space optical wireless links within turbulent scenarios [PDF]
, 2013 Free-Space Optical (FSO) communications link performance is highly affected when propagating through the time-spatially variable turbulent environment.
Anguita +29 more
core +2 more sources
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
doaj +1 more source
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
doaj +1 more source
Compact optical transmitters for CubeSat free-space optical communications [PDF]
, 2018 We present the results of an architectural trade study and prototype implementation of an optical transmitter suitable for resource-constrained CubeSats.
Cahoy, Kerri +2 more
core +1 more source
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
openaire +2 more sources