Results 21 to 30 of about 192,036 (316)

Optimizing Equivalent Circuit Model Parameters of DFB Lasers With RSM Model and NSGA-II Algorithm

open access: yesIEEE Photonics Journal, 2022
The parameters group of the distributed feedback (DFB) laser equivalent circuit model based on the single-mode rate equations is the key to precisely presenting DFB response characteristics, so a novel optimization solution based on the response surface ...
Qing-an Ding   +9 more
doaj   +1 more source

Optimisation of Lambertian order for indoor non-directed optical wireless communication [PDF]

open access: yes, 2012
This paper studies the optimised Lambertian order (OLO) of light-emitting diodes (LEDs) for an indoor non-directed line of sight optical wireless communication (NLOS-OWC) systems.
Ghassemlooy, Zabih   +11 more
core   +1 more source

Free-space scattering characterization of ultrathin reflective metasurfaces and high-Q-factor sensing methods for conductor-backed materials

open access: yesResults in Physics, 2022
Metal-backed materials establish the bridge linking traveling and surface waves for beam manipulation. Based on S-parameters, extracting the constitutive effective parameters (CEPs) is significant for characterizing their electromagnetic (EM) properties.
Feng-Yuan Han   +8 more
doaj   +1 more source

Prediction Algorithm of Key Design Parameters for Space Chaotic Optical Communication System

open access: yesIEEE Photonics Journal, 2020
Space laser optical communication has been widely investigated to achieve high bit rate information transmission. To enhance the information transmission security in space laser optical communication, chaos-based encryption scheme is adopted. It involves
Mi Li   +4 more
doaj   +1 more source

SDM-WDM ROADM Based on Direct-Laser-Writing SDM Core Separator

open access: yesIEEE Photonics Journal, 2022
Weakly-coupled space division multiplexing (SDM) techniques based on multi-core fibers (MCF) have attracted great attention for the capacity enhancement of optical interconnect systems and networks. In this paper, we propose a novel direct-laser-writing (
Yu Yang   +8 more
doaj   +1 more source

Frequency Stabilization of a Cesium Faraday Laser With a Double-Layer Vapor Cell as Frequency Reference

open access: yesIEEE Photonics Journal, 2022
We implement a compact optical frequency standard at the wavelength of 852 nm by the modulation transfer spectroscopy (MTS) technique, using a Faraday laser as the local oscillator and a double-layer cesium vapor cell to provide frequency reference.
Hangbo Shi   +5 more
doaj   +1 more source

Subwavelength Energy Transport Along a Dielectric Nanoparticle Chain in a Metal Slot

open access: yesIEEE Photonics Journal, 2013
Subwavelength energy transportation along a dielectric nanoparticle chain in a metal slot is investigated. It is demonstrated that subwavelength resonance modes with nanoscale confinement could be well achieved in the proposed waveguide, free from the ...
Bing Shen   +5 more
doaj   +1 more source

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

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

Broadband Photonic Down-Conversion Preprocessor for ADC With Arcsine Equalization

open access: yesIEEE Photonics Journal, 2020
It is a challenge to convert broadband millimeter-wave signals directly with electronic analog-to-digital converters (ADCs). The photonic down-conversion preprocessor is a promising solution.
Rui Guo   +6 more
doaj   +1 more source

Broadband Backhaul Communication for Stratospheric Platforms: The Stratospheric Optical Payload Experiment (STROPEX)

open access: yes, 2006
A high bitrate optical downlink was performed by the stratospheric optical payload experiment (STROPEX), a part of the EU CAPANINA project. The STROPEX objectives were to design and build the necessary hardware to demonstrate an optical backhaul downlink
Knapek, Markus   +9 more
core   +1 more source

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