Results 31 to 40 of about 1,875,449 (340)

A long-distance high-power microwave wireless power transmission system based on asymmetrical resonant magnetron and cyclotron-wave rectifier

open access: yesEnergy Reports, 2021
This paper demonstrates the analysis of a long-distance high-power microwave wireless power transmission (MWPT) system based on asymmetrical resonant magnetron and cyclotron-wave rectifier.
Biao Hu   +13 more
doaj   +1 more source

Exceeding the Manley-Rowe quantum efficiency limit in an optically pumped THz amplifier [PDF]

open access: yes, 2006
Using a microscopic theory based on the Maxwell-semiconductor Bloch equations, we investigate the possibility of an optically-assisted electrically-driven THz quantum cascade laser. Whereas in optical conversion schemes the power conversion efficiency is
Chow, Weng W.   +2 more
core   +2 more sources

Enhanced conversion efficiency for harmonic generation with double resonance [PDF]

open access: yes, 1993
Conversion efficiency for cw harmonic generation is calculated for the situation in which both fundamental and harmonic waves are resonant. Compared with the situation of a singly resonant cavity at the fundamental, the doubly resonant geometry can lead ...
Kimble, H. J., Ou, Z. Y.
core   +1 more source

Research status of replacement gases for SF6 in power industry

open access: yesAIP Advances, 2020
SF6 is widely used in the industrial field due to its stable structure and excellent properties. It is mainly used in electrical insulation equipment. Due to the boiling point of SF6, its use in extremely cold regions has been limited.
Shuangshuang Tian   +7 more
doaj   +1 more source

Increasing the conversion efficiency of KTP crystal using the pump-power technique

open access: yesIraqi Journal of Physics, 2020
In this study, the effect of pumping power on the conversion efficiency of nonlinear crystal (KTP) was investigated using laser pump-power technique. The results showed that the higher the pumping power values, the greater the conversion efficiency (η ...
Raied K. Jamal, Russul Khalil Rustum
doaj   +1 more source

Transport and Spectroscopic Studies of the Effects of Fullerene Structure on the Efficiency and Lifetime of Polythiophene-based Solar Cells [PDF]

open access: yes, 2011
Time-dependent measurements of both power conversion efficiency and ultraviolet-visible absorption spectroscopy have been observed for solar cell blends containing the polymer poly(3-hexylthiophene-2,5-diyl) (P3HT) with two different functionalized C60 ...
Adalsteinsson, Thorsteinn   +8 more
core   +3 more sources

Latest Updates of Single-Junction Organic Solar Cells up to 20% Efficiency

open access: yesEnergies, 2023
Single-junction organic solar cells have reached a power conversion efficiency of 20% with narrow bandgap non-fullerene electron acceptor materials such as Y6, as well as with large band gap electron donor materials and their derivatives.
Boudia Mohamed El Amine   +5 more
doaj   +1 more source

Relaxed damage threshold intensity conditions and nonlinear increase in the conversion efficiency of an optical parametric oscillator using a bi-directional pump geometry [PDF]

open access: yes, 2010
A novel bi-directional pump geometry that nonlinearly increases the nonlinear optical conversion efficiency of a synchronously pumped optical parametric oscillator (OPO) is reported.
Baxter   +12 more
core   +1 more source

The Influence Factor Analysis of Symmetrical Half-Bridge Power Converter through Regression, Rough Set and GM(1,N) Model

open access: yesAxioms, 2022
Analysis of power converter performance has tended to be engineering-oriented, focusing mainly on voltage stability, output power and efficiency improvement. However, there has been little discussion about the weight relations between these factors.
Shih-Kuen Changchien, Kun-Li Wen
doaj   +1 more source

Performance evaluation of on-chip wavelength conversion based on InP/In$_{1-x}$Ga$_x$As$_y$P$_{1-y}$ semiconductor waveguide platforms [PDF]

open access: yes, 2020
We propose and design the high confinement InP/In1-xGaxAsyP1-y semiconductor waveguides and report the results of effective wavelength conversion based on this platform.
Campbell, Michael A.   +12 more
core   +2 more sources

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