Results 21 to 30 of about 28,354 (309)

Coherent optical binary polarisation shift keying heterodyne system in the free-space optical turbulence channel [PDF]

open access: yes, 2011
In this paper, analytical and simulation results for the bit error rate (BER) performance and fading penalty of a coherent optical binary polarization shift keying (2PolSK) heterodyne system adopted for a free space optical (FSO) communication link ...
Z. Ghassemlooy   +12 more
core   +1 more source

Experimental Investigation of 400 Gb/s Data Center Interconnect Using Unamplified High-Baud-Rate and High-Order QAM Single-Carrier Signal

open access: yesApplied Sciences, 2019
In this article, we review the latest progress on data center interconnect (DCI). We then discuss different perspectives on the 400G pluggable module, including form factor, architecture, digital signal processing (DSP), and module power consumption ...
Yang Yue, Qiang Wang, Jon Anderson
doaj   +1 more source

Coherent Communication of Classical Messages [PDF]

open access: yesPhysical Review Letters, 2004
We define "coherent communication" in terms of a simple primitive, show it is equivalent to the ability to send a classical message with a unitary or isometric operation, and use it to relate other resources in quantum information theory. Using coherent communication, we are able to generalize super-dense coding to prepare arbitrary quantum states ...
openaire   +4 more sources

Adaptive Coherent Receiver Settings for Optimum Channel Spacing in Gridless Optical Networks

open access: yesFuture Internet, 2019
In this paper, we propose a novel circuit and system to optimize the spacing between optical channels in gridless (also called flexible-grid or elastic) networking.
Ahmad Abdo   +4 more
doaj   +1 more source

Adaptive Pre/Post-Compensation of Cascade Filters in Coherent Optical Transponders

open access: yesFuture Internet, 2020
We propose an adaptive joint pre- and post-compensation to correct the filtering effects caused by cascading reconfigurable optical add drop multiplexers (ROADMs).
Ahmad Abdo, Claude D’Amours
doaj   +1 more source

Coherent optical communications using coherence-cloned Kerr soliton microcombs

open access: yesNature Communications, 2022
Kerr frequency combs are a promising laser source for future optical networks. The authors demonstrate coherence-cloning between two remote Kerr combs and improve optical coherent communication in terms of performance, power consumption, and simplicity.
Yong Geng   +8 more
doaj   +1 more source

Rhythms for Cognition: Communication through Coherence [PDF]

open access: yesNeuron, 2015
I propose that synchronization affects communication between neuronal groups. Gamma-band (30-90 Hz) synchronization modulates excitation rapidly enough that it escapes the following inhibition and activates postsynaptic neurons effectively. Synchronization also ensures that a presynaptic activation pattern arrives at postsynaptic neurons in a ...
openaire   +5 more sources

Compensation for In-Phase/Quadrature Phase Mismatch in Coherent Free-Space Optical QPSK Communication Systems

open access: yesApplied Sciences, 2021
The Gram–Schmidt orthogonalization procedure (GSOP) and Löwdin symmetric orthogonalization procedure (SYOP) are the two mainstream algorithms for the compensation of phase mismatch in an imperfect optical 90° hybrid.
Xueliang Li   +4 more
doaj   +1 more source

Clock Recovery Challenges in DSP-Based Coherent Single-Mode and Multi-Mode Optical Systems

open access: yesFuture Internet, 2018
We present an analysis of clock recovery algorithms in both polarization division multiplexing systems and mode division multiplexing systems. The impact of inter-polarization time skew and polarization mode dispersion in single-mode fibers, as well as ...
Júlio César Medeiros Diniz   +2 more
doaj   +1 more source

Coherence Equality and Communication in a Quantum Superposition [PDF]

open access: yesPhysical Review Letters, 2020
Published version.
Del Santo, Flavio, Dakic, Borivoje
openaire   +4 more sources

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