Results 11 to 20 of about 19,076 (262)
Terrestrial Free-Space Optical Communications [PDF]
, 2010 Book abstract: Mobile and wireless communications applications have a clear impact on improving the humanity wellbeing. From cell phones to wireless internet to home and office devices, most of the applications are converted from wired into wireless communication.
Ghassemlooy, Zabih, Popoola, Wasiu O.
openaire +2 more sources
RESTORE: Low-Energy Drone-Assisted NLoS-FSO Emergency Communications
IEEE Access, 2022 Drones are becoming an alternative for the rapid but temporary deployment of data-communication infrastructure in disaster-struck areas. A drone may be equipped with communications equipment to provide network connectivity for stranded users and first ...
Paa Kwesi Esubonteng +1 more
doaj +1 more source
Point-to-point stabilized optical frequency transfer with active optics
Nature Communications, 2021 Atomic clocks and their networks are useful tools for optical communications and frequency metrology. Here the authors use phase stabilization and active tip-tilt to suppress atmospheric effects and enable optical frequency transfer through free-space.
Benjamin P. Dix-Matthews +10 more
doaj +1 more source
A Review of Semiconductor-Based Monolithic Optical Phased Array Architectures
IEEE Open Journal of the Solid-State Circuits Society, 2021 Semiconductor-based monolithic optical phased arrays (OPA) enable optical beam-steering for lidar and 3D imaging, free-space optical communications, projection and 3D holographical displays, and neural probes among many other possible applications.
Hossein Hashemi
doaj +1 more source
Free-Space Optical MISO Communications With an Array of Detectors
IEEE Open Journal of the Communications Society, 2020 Multiple-input multiple-output (MIMO) and multiple-input single-output (MISO) schemes have yielded promising results in free space optical (FSO) communications by providing diversity against fading of the received signal intensity.
Muhammad Salman Bashir +1 more
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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