Wavelength Conversion
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Wavelength of Experimental LEDS: Hardness, Elastic Modulus, Degree of Conversion and Temperature Rise of a Microhybrid Composite
The aim of this study was to evaluate the effect of different peak wavelengths (450nm, 468nm and 490nm) of experimental LEDs on hardness, elastic modulus, degree of conversion and temperature rise of a microhybrid resin composite – Venus® (Heraeus Kulzer). Hardness and elastic modulus were determined by nanoindentation technique (n=5), degree of conversio
Mat. Res.. Publicado em: 2015-04
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2. Caracterização bioquímica e biofísica da Celobiohidrolase II do fungo Trichoderma harzianum IOC3844 produzida por expressão homóloga / Biochemical and biophysical characterization of cellobiohydrolase II from Trichoderma harzianum IOC 3844 produced by homologous expression
The depletion of reserves, especially of refined oil , with increased energy demands and the urgent need to reduce the carbon emissions on the atmosphere, signals the necessity to search for new sources of energy renewable and clean. Concerns about global warming have led to an increased world interest in biofuels. The new concept of second generation biofue
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/07/2012
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3. Conversão em comprimento de onda de sinais modulados em fase por mistura de quatro ondas em SOAs / Wavelength conversion of phase modulated channels by four-wave mixing in SOAs
Recently semiconductor optical amplifiers (SOAs) have been the focus of interest in several applications. One of the most common SOA roles is as a wavelength converter, where the device transfers information content among optical carriers in the optical domain. Four wave mixing (FWM), cross-gain modulation (XGM), and cross-phase modulation (XPM) are major no
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
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4. AnÃlise experimental da degradaÃÃo imposta por sistemas Ãpticos a aplicaÃÃes IP / Experimental analysis of the degradation imposed by optical systems on IP
The objective of this work is to experimentally evaluate how physical impairments on the network can affect the performance of IP applications. Especially This work encompasses the analysis of the cross-layer effect caused by all-optical wavelength converters in the video signal. For this purpose, it was evaluated the packet error rate degradationcaused by p
Publicado em: 2010
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5. Guias de onda poliméricos para sensoriamento óptico e conversão de comprimento de onda / Polymeric based waveguides for optical biosensor and wavelength conversion
Um Luminescent Solar Concentrators (LSC) é basicamente uma base plástica transparente ou vidro contendo centros luminescentes.Enquanto o recente avanço dos conversores de comprimento de onda tenha aberto novas possibilidades para o desenvolvimento de células solares mais eficientes, estes também abriram novas frentes de pesquisa.Uma destas frentes envol
Publicado em: 2010
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6. Algoritmos RWA para redes ópticas transparentes considerando limitações da camada física / RWA algorithms for optical transparent networks considering physical impairments
With the proliferation of new multimedia services such as VoIP and IP-TV, an increasing demand for high rates of data transfer is being seen. Thus, the demand on the core of the network is continuously growing, so its capacity must increase in the same ratio to provide a reliable service to end users. The Transparent Optical Networks with WDM appears as a so
Publicado em: 2010
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7. Ultrafast electrooptical switching and regenerative conversion using semiconductor optical amplifiers / Chaveamento eletro-optico ultrarrapido e conversão regenerativa utilizando amplificadores opticos a semicondutor
Electrooptical switches, optical regenerators, and wavelength converters are relevant devices for the operation of future optical networks. In this work, measurements and simulations of an electrooptical switching time reduction technique based on multipulse current injection in semiconductor optical ampli.ers (SOA) are presented. Using the simulation result
Publicado em: 2009
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8. Chaveamento eletro-optico ultrarrapido e conversão regenerativa utilizando amplificadores opticos a semicondutor / Ultrafast electrooptical switching and regenerative conversion using semiconductor optical amplifiers
Electrooptical switches, optical regenerators, and wavelength converters are relevant devices for the operation of future optical networks. In this work, measurements and simulations of an electrooptical switching time reduction technique based on multipulse current injection in semiconductor optical ampli.ers (SOA) are presented. Using the simulation result
Publicado em: 2009
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9. Contribuições para a análise e simulação de redes ópticas: aspectos de Engenharia de Tráfego, restauração dinâmica e conversão de comprimentos de onda / Contributions for the analysis and simulation of optical networks: aspects of traffic engineering, dynamic restoration and conversion of wavelenghts
The Wavelength Division Multiplexing (WDM) technology as well as both the introduction of all optical OXCs (Optical Cross Connect) and OADMs (Optical Add/Drop Multiplexer) may provide the optical network with the networking function, i.e, the capacity to manipulate wavelengths in order to implement their routing. This possibility implies a new type of relati
Publicado em: 2009
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10. Nodes architecture and traffic engineering in optical networks / Arquitetura de nós e engenharia de tráfego em redes ópticas
Integrating telecommunication networks has enlarged the coverage, but has made operations more complex, mainly because of the architecture, formed by various layers. These layers deal with different protocols and transmission rates, as well as electrical and optical signals. The usual alternative of expanding the resources proportionally to the demand is imp
Publicado em: 2009
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11. Re(I) complexes and TiO2 films in photoinduced molecular devices / Complexos de Re(I) e filmes de TiO2 em dispositivos moleculares fotoinduzidos
The thesis focus on two main topics: characterization of TiO2 films for Dye-sensitized solar cells, DSCs, and investigation on photochemical and photophysical properties of Re(I) polypyridyl complexes. Mesoporous TiO2 films were prepared by sol-gel method and by commercial oxide (P25, Degussa) and were characterized by XRD, SEM, B.E.T. and XPS. Both oxides w
Publicado em: 2009
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12. Otimização da Produção e Caracterização de Goma Xantana Empregando Caldo de Cana
Xanthan gum production and its structural characterization under the conditions optimized by experimental design were the main objectives of this study. Several reports point to the sugar cane broth as an excellent raw material for the production of fermentable media, under the microbial species different action (bacteria, yeasts, fungi) in the products bios
Publicado em: 2009