Distributed Amplifier
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. A simple strategy to design broadband low power consumption distributed Raman amplifier
Abstract In this work, a simple strategy to design wideband low power consumption Raman amplifiers is demonstrated for a three-pump configuration using a low water peak optical fiber. The approach is based on the introduction of a novel numerical measure, which quantifies and isolates pump-pump interaction contribution to gain profile and analyzes its correl
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-09
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2. Hybrid distributed Raman/EDFA amplifier with hybrid automatic gain control for reconfigurable WDM optical networks
Nowadays, optical amplifiers designs are induced by new requirements generated by optical networks. The introduction of WDM reconfigurable networks with increasing rate from 10-40 Gb/s to 100 Gb/s and beyond, demand new optical amplifiers development with improved gain spectral flatness and noise figure for all operational range of input powers and set-point
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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3. Sistemas de sensores ópticos baseados em fibra óptica de perfil-W dopada com Érbio / Optical sensing systems based on Erbium-doped W-fiber
Depressed-cladding (often referred to as dual-clad or "W"- fiber) fibers with fundamental-mode cutoffs provide high distributed losses at long wavelengths and low losses at short wavelengths. The magnitude of the abrupt transition between low-loss at short wavelengths and high-loss at long wavelengths exceeds 200 dB/km and is found to be extremely sensitive
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/07/2012
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4. Design of distributed optical-fiber raman amplifiers using multi-objective particle swarm optimization
A novel method is presented to design the configuration of pumping lasers of Raman amplifiers using a multi-objective particle swarm optimizer. The goal is to obtain the pump laser wavelengths and powers that maximize the amplifier on-off gain, while maintaining the flatness of the gain over the used bandwidth. We used an algorithm called Multiple Objective
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2011-12
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5. Modelagem e analise dinamica de sistemas de proteção de redes de distribuição de energia eletrica na presença de geradores sincronos / Modeling and dynamic analysis of distribution network protection systems in the presence of synchronous generators
Recently, the need for the development of protection device dynamic models for analysis of distribution network protection systems has increased due to the usage of distributed generators. Therefore, the objective of this dissertation is to develop a dynamic model library torepresent the main relays used in the subtransmission and distribution network protec
Publicado em: 2007
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6. Modeling and dynamic analysis of distribution network protection systems in the presence of synchronous generators / Modelagem e analise dinamica de sistemas de proteção de redes de distribuição de energia eletrica na presença de geradores sincronos
Recently, the need for the development of protection device dynamic models for analysis of distribution network protection systems has increased due to the usage of distributed generators. Therefore, the objective of this dissertation is to develop a dynamic model library torepresent the main relays used in the subtransmission and distribution network protec
Publicado em: 2007
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7. Análise de um amplificador Raman distribuído nas bandas S+ e S utilizando a fibra óptica TrueWave Reach Low Water Peak
The performance of a distributed Raman amplifier at S - Band using the TrueWave Reach Low Water Peak fiber in a 100km span is analyzed through numerical simulations. The manufacturer, the OFS Fitel Denmark Ap, has experimentally characterized the physical parameters of the fiber, such as, attenuation, dispersion and Raman gain efficiency at Band - S. The low
Publicado em: 2006
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8. Design of distributed microwave oscillators with reverse feedback. / Projeto de osciladores de microondas distribuídos com realimentação reversa.
In this dissertation, a design methodology applied to microwave reverse feedback distributed voltage controlled oscillators - DVCO - is proposed. This circuit constitutes a new class of oscillators, obtained from reverse feeding back of the distributed amplifier. The main advantage of this topology is its capacity to achieve ultra-wideband frequency tuning.
Publicado em: 2005
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9. Amplificadores de baixo ruido em microondas
The theoretical part of this work deals with parameters that, direct or indirectly, are related with the design of microwave amplifiers. The study considered the S-parameters for 2-port devices (and their stability criteria) and also the noise characterization, since the main objective of this work was the minimization of noise in microwave amplifiers. Later
Publicado em: 1982