Ultra Short Optical Pulses
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Acopladores de cristais fotÃnicos e acesso mÃltiplo por divisÃo de cÃdigo Ãptico (OCDMA) com pulsos ultracurtos em fibras de Bragg / Photonic crystals couplers and optical code division multiple access (OCDMA) with optical ultra-short pulses in linear fiber Bragg gratings
This paper presents numerical simulation studies of propagation/switching of ultra-short pulses in photonic crystal couplers and Optical Code Division Multiple Access (OCDMA) using Fiber Bragg Grating (FBG). For coding were obtained analytically Gold codes. In the analysis of photonic crystal couplers (microstructured) investigated the properties of the prop
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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2. Estudo da estabilidade do acoplamento de modos de um laser a fibra dopada com érbio com pulsos de femtossegundos e taxa de 10 GHz
In this work we show a study of mode-locking stabilization in an Erbium doped fiber laser with assynchronous mode-locking generating ultra-short pulses at the rate of 10 GHz. The fiber effects are presented as well as the mode-locking techniques. Also is presented a study of energy pulse stabilization, frequency and cavity, in addition an overview of stabili
Publicado em: 2009
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3. Estudo e aplicações do fenômeno de absorção de dois fótons em moléculas azo-aromáticas / Studies and applications of two-photon absorption in azo-aromatic molecules
Here we investigated fundamental and applied aspects of the two-photon absorption process in azoaromatic compounds. Azoaromatic molecules have been studied in the last few years due to their applications in optical storage devices, light modulators and surface relief gratings, processes related to the photo-isomerization mechanism. The main focus of the resu
Publicado em: 2007
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4. Amplificadores Ãpticos, estudos de polarizaÃÃo e geraÃÃo de pulso usando processos paramÃtricos em fibras Ãpticas
The recent telecommunication development can be, to a large extent, attributed to the capacity of transmitting information (video, sound and data) at high transmission rates (Tbits/s) through the optical fiber. The constant advances in the technological development of active and passive devices based on optical fibers have enabled a steady increase in commun
Publicado em: 2007
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5. Mistura de quatro ondas na propagaÃÃo de pulsos Ãpticos ultra-curtos em fibras com dispersÃo decrescente para sistemas WDM / Mixture of four waves in the propagation of ultra-short optical pulses in fiber wither dispersion decreasing for WDM systems
Serà estudado nesta dissertaÃÃo o comportamento da propagaÃÃo de trÃs tipos de pulsos Ãpticos (Solitons, Quasisolitons e Gaussianos) ultracurtos na regiÃo de 1.55μm e a eficiÃncia de conversÃo destes na geraÃÃo de pulsos por meio do fenÃmeno nÃo-linear de mistura de quatro ondas (FWM) em uma fibra comum e em fibras com dispersÃo decrescen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2005
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6. CHARACTERISATION OF ALLOPTICAL WAVELENGTH CONVERSION BY CROSS-GAIN MODULATION IN SEMICONDUCTOR OPTICAL AMPLIFIERS / CARACTERIZAÇÃO DA CONVERSÃO DE COMPRIMENTO DE ONDA POR MODULAÇÃO DE GANHO CRUZADO EM AMPLIFICADORES ÓPTICOS SEMICONDUTORES
Wavelength conversion of optical signals by all-optical techniques is an innovative and necessary technology for wavelength routed networks in the near future; the cross-gain modulation method is one of the simplest, in form, to attain this goal. Two categories of the main technique are presented: the classic, also known as pump and probe, and a novel one, n
Publicado em: 2005
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7. ULTRA-SHORT OPTICAL PULSES GENERATION USING RATIONAL MODE-LOCKING IN FIBER LASERS / GERAÇÃO DE PULSOS ÓPTICOS ULTRACURTOS USANDO A TÉCNICA DE MODE-LOCKING RACIONAL EM LASERS A FIBRA
This work describes a simple and stable harmonically mode- locked erbium-doped fiber ring laser, that produces high power, ~ 1 ps transform-limited sech optical pulses. Pulse trains with different high repetition rates were obtained using harmonic mode-locking and rational harmonic mode- locking techniques. The temporal and spectral characteristics of the pu
Publicado em: 2000
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8. Pulse confinement in optical fibers with random dispersion
Short-range correlated uniform noise in the dispersion coefficient, inherent in many types of optical fibers, broadens and eventually destroys all initially ultra-short pulses. However, under the constraint that the integral of the random component of the dispersion coefficient is set to zero (pinned), periodically or quasi-periodically along the fiber,
The National Academy of Sciences.