Results 11 to 20 of about 6,475,800 (310)

Optical Communications and Networks [PDF]

open access: yesIEEE Communications Magazine, 2020
As the second issue in 2020 of the Optical Communications and Networks Series (OCNS), this series selects articles that cover interesting advances on devices, systems and networks regarding optical communications and networking. We are pleased to witness active innovations in this area, which will make the data exchange and processing in the future ...
Zuqing Zhu   +2 more
openaire   +6 more sources

Bandwidth Control in Computer- Generated Holography

open access: yesIEEE Photonics Journal, 2023
The Fourier transform between the time and frequency signals of light enables highly efficient band usage in optical communications. Analogously, the Fourier transform between the wavefield and wavevector distributions in the optical spatial diffraction ...
Mian Wu   +6 more
doaj   +1 more source

Investigation of Fan In and Fan Out Technologies for Multi Core Fiber

open access: yesGuangtongxin yanjiu, 2021
Spatial division multiplexing based on the multi-core fiber has been believed as a promising and effective way to overcome the foreseeable capacity crunch of single mode fiber transmission. Fan-in Fan-out (FIFO) technology for multi-core fiber is the key
Ying QIU   +3 more
doaj   +1 more source

Concrete Multi-Type Defect Classification Algorithm Based on MSSMA-SVM

open access: yesSensors, 2022
In order to realize the automatic classification of internal defects for non-contact nondestructive testing of concrete, a concrete multi-type defect classification algorithm based on the mixed strategy slime mold algorithm support vector machine (MSSMA ...
Xu Tian   +4 more
doaj   +1 more source

Performance optimization of free-space optical communication protocols based on results from FSO demonstrations [PDF]

open access: yes, 2007
The mobile free-space optical channel mainly suffers from relatively long link outages, produced by short-term blockings of the line-of-sight (obstacles, clouds), pointing- and tracking-errors or deep signal-fades caused by index of refraction turbulence
Bernhard Epple, Epple, Bernhard
core   +1 more source

Optical High-Capacity Satellite Downlinks via High-Altitude Platform Relays [PDF]

open access: yes, 2007
Earth-observation (EO) satellite missions produce a large amount of data using high-resolution optical or radar sensors. During the last decades the amount of data has steadily increased due to improved sensor technologies with increased temporal ...
Florian Moll   +13 more
core   +1 more source

Dynamic Fano Resonance in Thin Fiber Taper Coupled Cylindrical Microcavity

open access: yesIEEE Photonics Journal, 2016
Fano resonance results from interference between a background and a resonant scattering, which produces the asymmetrical lineshape. A cylindrical microcavity naturally possesses localized whispering gallery mode (WGM) and delocalized radiation mode, and ...
Yadong Miao   +5 more
doaj   +1 more source

An Internal Defect Detection Algorithm for Concrete Blocks Based on Local Mean Decomposition-Singular Value Decomposition and Weighted Spatial-Spectral Entropy

open access: yesEntropy, 2023
Within the scope of concrete internal defect detection via laser Doppler vibrometry (LDV), the acquired signals frequently suffer from low signal-to-noise ratios (SNR) due to the heterogeneity of the concrete’s material properties and its rough surface ...
Xu Tian   +4 more
doaj   +1 more source

Using a GPS-Aided Inertial System for Coarse-Pointing of Free-Space Optical Communication Terminals [PDF]

open access: yes, 2006
In the Capanina project, it has been shown that it is possible to use solely GPS positions for coarse-pointing of a stratospheric free-space optical communication terminal.
Bernhard Epple, Epple, Bernhard
core   +1 more source

A High Performance Distributed Optical Fiber Sensor Based on Φ-OTDR for Dynamic Strain Measurement

open access: yesIEEE Photonics Journal, 2017
A high-performance distributed optical fiber sensor based on phase-sensitive optical time-domain reflectometry (Φ-OTDR) for dynamic strain measurement has been proposed.
Xuping Zhang   +6 more
doaj   +1 more source

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