Results 31 to 40 of about 3,448,612 (259)

Fully integrated high quality factor GmC bandpass filter stage with highly linear operational transconductance amplifier [PDF]

open access: yesAdvances in Radio Science, 2017
This paper presents an electrical, fully integrated, high quality (Q) factor GmC bandpass filter (BPF) stage for a wireless 27 MHz direct conversion receiver for a bendable sensor system-in-foil (Briem et al., 2016).
J. Briem   +6 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

The effect of atmospheric turbulence on the performance of the free space optical communications [PDF]

open access: yes, 2008
In free space optical (FSO) communication links, atmospheric turbulence has a significant impact on the quality of a laser beam propagating through the atmosphere.
Ghassemlooy, Zabih   +7 more
core   +1 more source

Lambertian source modelling of free space optical ground-to-train communications [PDF]

open access: yes, 2012
There is a increasing demand for high speed data services while travelling on trains and other means of public transportation. Hence, an alternative technology to radio frequency (RF) communications called free space optics (FSO) could be used to provide
Ghassemlooy, Zabih   +9 more
core   +1 more source

Tera-sample-per-second arbitrary waveform generation in a synthetic dimension

open access: yesCommunications Physics, 2023
Synthetic dimension opens new horizons in quantum physics and topological photonics by enabling new dimensions for field and particle manipulations.
Yiran Guan   +8 more
doaj   +1 more source

Investigation into the integration of a resonant tunnelling diode and an optical communications laser: model and experiment [PDF]

open access: yes, 2007
A resonant tunnelling diode has been monolithically integrated with an optical communications laser [the resonant tunnelling diode (RTD-LD)] to form a simple optoelectronic integrated circuit (OEIC) that is a novel bistable device suitable for an optical
T.J. Slight   +3 more
core   +2 more sources

LD-Pumped Random Fiber Laser Based on Erbium-Ytterbium Co-Doped Fiber

open access: yesPhotonic Sensors, 2019
In this paper, a cladding-pumped erbium-ytterbium co-doped random fiber laser (EYRFL) operating at 1550 nm with high power laser diode (LD) is proposed and experimentally demonstrated for the first time.
Qingyang Meng   +4 more
doaj   +1 more source

Optical wireless for intravehicle communications : a channel viability analysis [PDF]

open access: yes, 2012
This paper provides an initial analysis into the viability of implementing an optical wireless system for intravehicle communications. Based on the use of a simple linearly scalable infrared light-emitting-diode transmitter, the results for received ...
Mark S. Leeson   +5 more
core   +1 more source

BPSK subcarrier intensity modulated free-space optical communications in atmospheric turbulence [PDF]

open access: yes, 2009
Free-space optical communications (FSO) propagated over a clear atmosphere suffers from irradiance fluctuation caused by small but random atmospheric temperature fluctuations.
Ghassemlooy, Zabih   +3 more
core   +1 more source

Design of a Tunable Ultra-Broadband Terahertz Absorber Based on Multiple Layers of Graphene Ribbons

open access: yesNanoscale Research Letters, 2018
We propose and numerically demonstrate an ultra-broadband graphene-based metamaterial absorber, which consists of multi-layer graphene/dielectric on the SiO2 layer supported by a metal substrate.
Zenghui Xu   +6 more
doaj   +1 more source

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