Results 11 to 20 of about 10,131,863 (310)
Orbital angular momentum and beyond in free‐space optical communications [PDF]
Nanophotonics, 2022 Orbital angular momentum (OAM), which describes tailoring the spatial physical dimension of light waves into a helical phase structure, has given rise to many applications in optical manipulation, microscopy, imaging, metrology, sensing, quantum science,
Jian Wang, Long Zhu, Shuhui Li
exaly +3 more sources
Bidirectional wavelength-division-multiplexing fibre-free-space optical communications using polarisation multiplexing technique and tunable optical vestigial sideband filter. [PDF]
Commun EngTo address the growing demand from emerging applications, high transmission capacity is essential for both fibre backbones and last-mile communications.
Lin HM +9 more
europepmc +2 more sources
An Introduction to Free-space Optical Communications
Radioengineering, 2010 Over the last two decades free-space optical communication (FSO) has become more and more interesting as an adjunct or alternative to radio frequency communication. This article gives an overview of the challenges a system designer has to consider while implementing an FSO system. Typical gains and losses along the path from the transmitter through the
Henniger, Hennes, Wilfert, Otakar
openaire +3 more sources
LDPC Decoding Techniques for Free-Space Optical Communications
IEEE Access, 2021 There has been significant interest in free-space optical (FSO) communication by the research community in recent years. This is due to its high data rate, unlicensed spectrum, low cost, and immense security for FSO systems.
Albashir Adel Youssef +2 more
doaj +1 more source
Drones, 2023 Free-space optical (FSO) communication promises to bring fibre-like speeds to data transmissions between ground, sky and space. This is becoming more important in light of the increasing volume of data collected by aircraft and spacecraft. The University
Skevos F. E. Karpathakis +7 more
doaj +1 more source
Deep learning for enhanced free-space optical communications
Machine Learning: Science and Technology, 2023 Atmospheric effects, such as turbulence and background thermal noise, inhibit the propagation of light used in ON–OFF keying (OOK) free-space optical (FSO) communication. Here we present and experimentally validate a convolutional neural network (CNN) to
M P Bart +10 more
doaj +1 more source
Relay-assisted free-space optical communication [PDF]
IEEE Transactions on Wireless Communications, 2007 In this paper, we present relay-assisted transmission as a powerful fading mitigation tool for free-space optical systems operating in atmospheric turbulence channels. We study both serial (i.e., multi-hop transmission) and parallel (i.e., cooperative diversity) relaying encoupled with amplify-and-forward and decode-and-forward modes.
Majid Safari, Murat Uysal
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Scientific Reports, 2021 Recently, new physics for unconditional security in a classical key distribution (USCKD) has been proposed and demonstrated in a frame of a double Mach–Zehnder interferometer (MZI) as a proof of principle, where the unconditional security is rooted in ...
Byoung S. Ham
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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
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