Coherence Optics
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. O campo eletromagnético quantizado submetido a ruído e acoplado a um oscilador mecânico / The quantized electromagnetic field submitted to noise and coupled to a mechanical oscillator
In this project we will investigate the influence of noise in the process of interaction of radiation (quantized field) with the matter (mesoscopic mechanical system). We will consider the mode field confined in a cavity of high quality factor with a fixed mirror and one moving mirror, this treated as a mechanical oscillator susceptible to radiation pressure
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/05/2012
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2. Separação cega de sinais em sistemas ópticos com multiplexação de polarização / Bilnd source separation in ppolarization multiplexed optical systems
A multiplexação de polarização é uma técnica promissora que permite dobrar a capacidade de transmissão das próximas gerações de sistemas de comunicações ópticas operando a 40 Gb/s. Tais sistemas são dependentes de processamento digital de sinais, tanto para efetuar a separação dos sinais multiplexados em polarização, quanto para combater de
Publicado em: 2010
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3. AvaliaÃÃo de tÃcnicas diagnÃsticas de lesÃo de cÃrie proximal: raio X, transiluminaÃÃo com radiaÃÃo infravermelho prÃximo e tomografia por coerÃncia Ãptica
This work was organized in the form of scientific papers to be sent to international journals, specializing in the interface between Physics and Biomedical Dentistry, preceded by an introduction to the topic and literature review. The review of literature in electronic databases, international research on the complexity of advanced methods for early diagnosi
Publicado em: 2009
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4. CaracterizaÃÃo Ãptica de materiais nanoestruturados por tÃcnicas de geraÃÃo de segundo e terceiro harmÃnico
This work is dedicated to the optical characterization of nanostructured materials that are of interest for non-linear optics, optoelectronics and nanophotonics. The hyper- Rayleigh scattering (HRS) technique and the third harmonic generation (THG) technique were used. The materials investigated were a glass-ceramics containing sodium niobate (NaNbO3) nanocr
Publicado em: 2007
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5. Elemento óptico difrativo de luz branca gerado por computador / White light computer-generated element
Holograms can be produced using traditional holography techniques or may be also generated by computer, which are known as CGHs(Computer-generated holograms). Most of these holograms operate using monochromatic light. On the other hand, holograms can also operate with white light. These white light holograms are used in several applications, such as security
Publicado em: 2007
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6. Acoplamento de dois feixes com lasers de femtossegundos em vapor de Rb
Femtosecond lasers operating in the mode-locked regime have a repetition rate determined by the round trip time of the pulse inside the laser cavity (TR = 2L/c). For Ti:sapphire lasers the repetition rate is typically of the order of 100 MHz, with TR 10 ns. Under this condition TR may be smaller then the population relaxation time (T1) and the coher
Publicado em: 2007
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7. TÃcnicas de Interferometria Ãptica aplicada à medicina, odontologia e comunicaÃÃes Ãpticas
In the work described in this thesis, we used two different interferometric techniques, the coherent optical frequency domain reflectometry (COFDR), and the optical coherence tomography (OCT). Both techniques are based on the Michelson interferometer. They were applied to optical communications and to medical and dentistry imaging. We will give a general des
Publicado em: 2006
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8. Interferometry with large molecules: exploration of coherence, decoherence and novel beam methods
Quantum experiments with complex objects are of fundamental interest as they allow to quantitatively trace the quantum-to-classical transition under the influence of various interactions between the quantum object and its environment. We briefly review the present status of matter wave interferometry and decoherence studies with large molecules and focus in
Brazilian Journal of Physics. Publicado em: 2005-06
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9. Manipulação de estados quanticos da luz via espelhos semi-transparentes
Not informed
Publicado em: 2004