Results 41 to 50 of about 313,418 (192)

The Orbital Angular Momentum Encoding System With Radial Indices of Laguerre–Gaussian Beam

open access: yesIEEE Photonics Journal, 2018
Orbital angular momentum (OAM) in optical vortices (OV) beams offers a new dimension of space mode because coaxially propagating OV beams with different azimuthal OAM states are mutually orthogonal.
Zhongyi Guo   +3 more
doaj   +1 more source

Bit error rate measurement of free space optical communication links under laboratory controlled conditions [PDF]

open access: yes, 2011
This paper outlines the experimental investigation of the fog effect on the bit error rate (BER) performance of the free space optical (FSO) communication link under a controlled laboratory environment.
Ghassemlooy, Zabih   +5 more
core  

Demonstration of analyzers for multimode photonic time-bin qubits

open access: yes, 2018
We demonstrate two approaches for unbalanced interferometers as time-bin qubit analyzers for quantum communication, robust against mode distortions and polarization effects as expected from free-space quantum communication systems including wavefront ...
Agne, Sascha   +5 more
core   +1 more source

Optical Orbital Angular Momentum Shift-Keying Communication Using Direct Demodulation

open access: yesIEEE Access, 2019
Orbital angular momentum (OAM) shift-keying (SK), which manifests as the rapid switching of OAM modes, is crucial but severely hampered for lacking effective demodulation techniques in OAM communication.
Ying Li   +9 more
doaj   +1 more source

A simple method for designing or analyzing an optical communication link [PDF]

open access: yes, 1986
A simple method is described for determining the performance of a free space optical communication link. The method can be used either in the system design (synthesis) mode or in the performance evaluation (analysis) mode.
Katz, J., Lesh, J. R., Marshall, W. K.
core   +1 more source

Free-Space Applications of Silicon Photonics: A Review

open access: yesMicromachines, 2022
Silicon photonics has recently expanded its applications to delivering free-space emissions for detecting or manipulating external objects. The most notable example is the silicon optical phased array, which can steer a free-space beam to achieve a chip ...
Chung-Yu Hsu   +2 more
doaj   +1 more source

Communication protocols for Free-Space Optical links [PDF]

open access: yes, 2015
Táto diplomová práca sa zaoberá správaním protokolu TCP/IP pri prechode bezdrôtovým optickým spojom, ktorý je ovplyvnený atmosférickými turbulenciami. Tie spôsobujú fluktuáciu prijímaného optického výkonu a tým zmenu bitovej chybovosti spoja.
Šedo, Ondrej
core   +1 more source

CTA Telescopes as Deep-Space Lasercom Ground Receivers

open access: yesIEEE 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

Atmospheric channel effects on terrestrial free space optical communication links [PDF]

open access: yes, 2009
. This paper illustrates the challenges imposed by the atmospheric channel on the design of a terrestrial laser communication link. The power loss due to scattering effect is described using the Kim/Kruse scattering model while the effect and the penalty
Awan, Muhammad   +3 more
core   +1 more source

Retrofitting FSO Systems in Existing RF Infrastructure: A Non-Zero-Sum Game Technology

open access: yesIEEE Open Journal of the Communications Society, 2021
Progress in optical wireless communication (OWC) has unleashed the potential to transmit data in an ultra-fast manner without incurring large investments and bulk infrastructure.
Abderrahmen Trichili   +8 more
doaj   +1 more source

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