Results 51 to 60 of about 118,454 (169)

An Environmentally Stable and Lead-Free Chalcogenide Perovskite

open access: yes, 2019
Organic-inorganic halide perovskites are intrinsically unstable when exposed to moisture and/or light. Additionally, the presence of lead in many perovskites raises toxicity concerns.
Balasubramanian, Ganesh   +16 more
core   +1 more source

The Analysis of the Polaroid Optocoupler Mechanical-electrical Sensor

open access: yesAdvances in Electrical and Computer Engineering, 2010
This paper presents the results of the analysis of Polaroid optocoupler mechanical-electrical sensor static characteristics. Our paper achieves analysis on distance adjustment Polaroid optocouplers of LED-photoresistor and LED-phototransistor types ...
DIMIAN, M., CIURUS, I. M., GRAUR, A.
doaj   +1 more source

Frequency and temperature control for complex system engineering in optoelectronics and electronics: an overview

open access: yesInternational Journal for Simulation and Multidisciplinary Design Optimization, 2020
To take advantage of the physical principles of determining parameters, such as frequency stability, noise and also alignment of optical signals, it is necessary to control complex systems.
Salzenstein Patrice
doaj   +1 more source

Novel fabrication technique for planar glass waveguides

open access: yes, 1998
A novel technique has been developed for the deposition of low-loss planar glass waveguides by directly spin coating from the liquid, thus overcoming the problems of reproducing glass stoichiometry when depositing from the ...
Brown, C.T.A.   +4 more
core   +1 more source

Characterization of 40-Gbit/s pulses generated using a lithium niobate modulator at 1550 nm using frequency resolved optical gating [PDF]

open access: yes, 2004
The characteristics of 40-Gbit/s pulses generated by exploiting the nonlinear characteristics of a Mach-Zender Lithium Niobate modulator are presented. A high spectral resolution frequency resolved optical gating apparatus has been developed to allow for
Barry, Liam P.   +4 more
core   +1 more source

A visible-light photodetector based on heterojunctions between CuO nanoparticles and ZnO nanorods

open access: yesBeilstein Journal of Nanotechnology, 2023
Optoelectronic devices have various applications in medical equipment, sensors, and communication systems. Photodetectors, which convert light into electrical signals, have gained much attention from many research teams.
Doan Nhat Giang   +8 more
doaj   +1 more source

Photonic microwave harmonic generator driven by an optoelectronic ring oscillator [PDF]

open access: yes, 2007
We describe a new architecture to generate microwave signals by optical means. Our system combines the advantages of two techniques: frequency multipliers and loop oscillators.
Le Kernec, Arnaud   +2 more
core   +1 more source

New multiplexing scheme for monitoring fiber optic Bragg grating sensors in the coherence domain

open access: yes, 1997
A new multiplexing scheme for monitoring fiber optic Bragg gratings in the coherence domain has been developed. Grating pairs with different grating distances are distributed along a fiber line, and interference between their reflections is monitored ...
Dakin, J.P.   +5 more
core   +1 more source

A study of discrete wavelet transform based denoising to reduce the effect of artificial light interferences for indoor optical wireless communication [PDF]

open access: yes, 2010
The optical power penalty (OPP) due to the artificial light interferences (ALIs) can be significantly high in an indoor optical wireless communication (OWC) channel making such link practically infeasible.
Angelova, Maia   +2 more
core   +1 more source

Two-Dimensional Silicon Carbide: Emerging Direct Band Gap Semiconductor

open access: yesNanomaterials, 2020
As a direct wide bandgap semiconducting material, two-dimensional, 2D, silicon carbide has the potential to bring revolutionary advances into optoelectronic and electronic devices.
Sakineh Chabi, Kushal Kadel
doaj   +1 more source

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