Results 71 to 80 of about 246,737 (191)

On the Performance of Coherent OFDM Systems in Free-Space Optical Communications

IEEE Photonics Journal, 2015
This paper presents a new model of a coherent orthogonal frequency division multiplexing free space optical communication (OFDM-FSO) system that can be tuned with the virtual local oscillator, under the Gamma-Gamma atmospheric turbulence channel, not ...
Yi Wang, Deli Wang, Jing Ma
doaj   +1 more source

Free Space Optical Communications: An Overview

European Scientific Journal, ESJ, 2016
Bridging the so-called “last mile” in communication networks has revived keen interest in free-Space Optics (FSO), also known as fiber-free or fiberless optics, which is a technology that transports data via laser technology. It is a line-of-sight technology that currently enables optical transmission up to 2.5 Gbps of data, voice and video through the
M. N. O. Sadiku, S.M. Musa, Sudarshan R. Nelatury   +2 more
openaire   +2 more sources

Cavity atom optics and the `free atom laser'

, 1999
The trap environment in which Bose-Einstein condensates are generated and/or stored strongly influences the way they interact with light. The situation is analogous to cavity QED in quantum optics, except that in the present case, one tailors the matter ...
Adams, Bonifacio, Elias, Englert, Giessen, Haroche, Hopf, Hopf, Inouye, J. Heurich, Lenz, M.G. Moore, Meystre, Moore, Moore, P. Meystre, Parker, Scully, Shore   +18 more
core   +1 more source

Demonstration of 100 Gbps coherent free-space optical communications at LEO tracking rates. [PDF]

Sci Rep, 2022
Walsh SM, Karpathakis SFE, McCann AS, Dix-Matthews BP, Frost AM, Gozzard DR, Gravestock CT, Schediwy SW.   +7 more
europepmc   +1 more source

A State-Space Framework for Parallelizing Digital Signal Processing in Coherent Optical Receivers

Sensors
Ultra-high sampling rates in coherent optical front-ends increasingly exceed the processing capabilities of real-time baseband processors, creating a bottleneck in coherent free-space optical communication systems.
Jinyang Wang, Zhugang Wang, Di Liu
doaj   +1 more source

High speed train communications systems using free space optics [PDF]

, 2010
In this work, we propose a broad-band free space optical (FSO) wireless communications system for high-speed trains. The system consists of optical transceivers positioned outside the train and along the railway track.
Ghassemlooy, Zabih, Iaz, M., Le Minh, Hoa, Paudel, Rupak, Rajbhandari, Sujan   +4 more
core  

Coherent Separation Detection for Orbital Angular Momentum Multiplexing in Free-Space Optical Communications

IEEE Photonics Journal, 2017
Beams carrying orbital angular momentum (OAM) are very helpful in enhancing the information carrying capacity in free-space optical communications. However, atmospheric turbulence and energy attenuation will seriously affect communication quality and ...
Xiaoke Zhang, Yanliang He, Yao Cai, Mingyang Su, Xinxing Zhou, Yu Chen, Shuqing Chen, Yuanjiang Xiang, Lin Chen, Chenliang Su, Ying Li, Dianyuan Fan   +11 more
doaj   +1 more source

High-capacity free-space optical communications using wavelength- and mode-division-multiplexing in the mid-infrared region. [PDF]

Nat Commun, 2022
Zou K, Pang K, Song H, Fan J, Zhao Z, Song H, Zhang R, Zhou H, Minoofar A, Liu C, Su X, Hu N, McClung A, Torfeh M, Arbabi A, Tur M, Willner AE.   +16 more
europepmc   +1 more source

Precision Laser Development for Gravitational Wave Space Mission [PDF]

, 2011
Optical fiber and semiconductor laser technologies have evolved dramatically over the last decade due to the increased demands from optical communications.
Camp, Jordan, Numata, Kenji
core   +1 more source

Cₙ² Modeling for Free-Space Optical Communications: A Review

IEEE Access
Atmospheric turbulence influence on optical wave propagation, referred to as optical turbulence, has long been studied for astronomical applications and is now being addressed for free-space optical communication links between ground and satellites ...
Florian Quatresooz, Claude Oestges
doaj   +1 more source