نتایج جستجو برای: conversion efficiency

تعداد نتایج: 486520  

Journal: :Optics express 2013
M T Chang W Z Zhuang K W Su Y T Yu Y F Chen

We demonstrated a continuous-wave (CW) self-Raman laser with high conversion efficiency by using Yb:KGW as the Raman crystal. The first Stokes line of wavelength centered at 1095.2 nm with spectral bandwidth of 8 nm and the cascaded Raman conversion wavelength at 1109.5 nm with spectral bandwidth of 3.4 nm were observed with a Raman shift of 89 cm⁻¹ with respect to the fundamental laser wavelen...

2004
M. Kanskar Z. Dai T. Earles

Al-free active diode laser emitting near 970 nm wavelength has been optimized for high electricalto-optical power conversion efficiency. There are numerous key contributors such as scattering and absorption losses, band alignment, Joule heating, carrier leakage and below-threshold losses that contribute to power loss mechanisms. We report on improvement from 50% to a record high 70% power conve...

2011
Chong Chen Yi Xie Ghafar Ali Seung Hwa Yoo Sung Oh Cho

We improve the conversion efficiency of Ag2S quantum dot (QD)-sensitized TiO2 nanotube-array electrodes by chemically depositing ZnO recombination barrier layer on plain TiO2 nanotube-array electrodes. The optical properties, structural properties, compositional analysis, and photoelectrochemistry properties of prepared electrodes have been investigated. It is found that for the prepared electr...

Journal: :journal of advances in computer research 0

in this paper, a new method is introduced for improving the efficiency of the residue number system, which uses both binary and residue representations in order to represent a number. a residue number system uses the remainder of the division in several different modules. conversion of a number to smaller ones and carrying out parallel calculations on these numbers greatly increase the speed of...

Journal: :Bioresource technology 2014
Yao Wang Jin Liu Henri Gerken Chengwu Zhang Qiang Hu Yantao Li

Energy-intensive chemical conversion of crude algal oils into biodiesel is a major barrier for cost-effective algal biofuel production. To overcome this problem, we developed an enzyme-based platform for conversion of crude algal oils into fatty acid methyl esters. Crude algal oils were extracted from the oleaginous microalga Nannochloropsis oceanica IMET1 and converted by an immobilized lipase...

2016
Tzu-Neng Lin Svette Reina Merden S. Santiago Jie-An Zheng Yu-Chiang Chao Chi-Tsu Yuan Ji-Lin Shen Chih-Hung Wu Cheng- An J. Lin Wei-Ren Liu Ming-Chiang Cheng Wu-Ching Chou

Graphene has been used to synthesize graphene quantum dots (GQDs) via pulsed laser ablation. By depositing the synthesized GQDs on the surface of InGaP/InGaAs/Ge triple-junction solar cells, the short-circuit current, fill factor, and conversion efficiency were enhanced remarkably. As the GQD concentration is increased, the conversion efficiency in the solar cell increases accordingly. A conver...

Journal: :Optics letters 2013
Dror Shayovitz Harald Herrmann Wolfgang Sohler Raimund Ricken Christine Silberhorn Dan M Marom

We report the first demonstration, to our knowledge, of time-to-space conversion of subpicosecond pulses in a slab nonlinear waveguide. By vertically confining the nondegenerate sum-frequency generation interaction between a spatially dispersed 100 fs signal pulse at 1.55 μm and a reference pulse in a titanium indiffused planar periodically poled lithium niobate crystal waveguide, we have attai...

2005
B. A. KENNER H. F. CLARK P. W. KABLER

Conversion of 2-oxoadipic acid to lysine with Saccharomyces cerevisiae was accomplished in aerated and agitated fermentors under fermentation conditions resembling those used in baker's yeast process. With this process, a yeast product containing about 16 per cent hot water-extractable lysine (calculated as hydrochloride) was obtained. The conversion efficiency of 2-oxoadipic acid to lysine was...

2015
Michael Stringer David Lidzey

In recent years perovskite based solar cells have become a promising photovoltaic technology, most notable for their high power conversion efficiencies and potential for cheap solution-processable module production. This report identifies the ongoing research and development into the behaviour of the perovskite material as a semiconducting active area and the ever improving fabrication of perov...

Journal: :Physical review letters 2005
E Hodby S T Thompson C A Regal M Greiner A C Wilson D S Jin E A Cornell C E Wieman

We investigate the production efficiency of ultracold molecules in bosonic 85Rb and fermionic 40K when the magnetic field is swept across a Feshbach resonance. For adiabatic sweeps of the magnetic field, our novel model shows that the conversion efficiency of both species is solely determined by the phase space density of the atomic cloud, in contrast with a number of theoretical predictions. I...

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