Diode Pumped
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Ressonadores de microdiscos com região ativa nanoestruturada bombeados por injeção eletrônica / Microdisk resonators with nanostructured active region pumped by electronic injection
This doctorate¿s thesis presents the growth of InAs quantum dots directly on high bandgap InGaAsP (?g=1420 nm) barriers to be used as the active region of microdisk resonators with emission in the C-band (1520¿1570 nm). Based on photoluminescence and atomic force microscopy experiments, the occurrence of inter-diffusion on the InAs/InGaAsP interface is cal
Publicado em: 2010
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2. Desenvolvimento de um laser de Nd:YLF bombeado por diodo laser e duplicado em frequencia para 657 nm / Development of a diode pumped Nd:YLF laser, frency doubled to 657 nm
Atomic clocks are used today in a number of scientific and technological applications, ranging from tests of relativity, or variations of fundamental constants, to the use in navigation and telecommunication. The next generation of such high precision devices will be based on optical transitions of suitable laser cooled and trapped atoms. In this work we des
Publicado em: 2009
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3. Estudo, desenvolvimento e otimização de um Laser de ER3+:YLF emitindo na região de 3m bombeado por diodo / STUDY, DEVELOPMENT AND OPTIMIZATION OF A DIODE PUMPED Er3+:YLF LASER EMMITING IN THE 3m REGIO
In this work we present the development of a laser system based on an Er:YLF Brewster cut crystal with 15mol% erbium at the yttrium site, emitting at 3 m and pumped by a laser diode emitting at 975 nm. Using this system we obtained 1,80(18) W peak power when operating in the quasi-continuous regime. The cavity is optimized for medical applications and to ope
Publicado em: 2008
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4. Otimização da eficiência do modo TEM00 em lasers de Nd:YLF de alta potência bombeados lateralmente / TEM00 MODE EFFICIENCY ENHANCEMENT IN HIGH POWER DIODE-SIDEPUMPED Nd:YLF LASERS
For many laser applications high beam quality in fundamental mode is necessary. In this work we study the conditions that achieve high efficiency and high beam quality by optimizing the overlap between the fundamental mode and the excited region inside the active medium, using novel cavities. The highest efficiency reported so far for diode side pumped 1053
Publicado em: 2008
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5. Laser de Nd:YLF para aplicações em LIDAR / LASER DE Nd:YLF PARA APLICAÇÕES EM LIDAR
A utilização de lasers de estado sólido bombeados por diodos laser tem atraído interesse crescente devido a sua alta eficiência, seu tamanho compacto e com a possibilidade da operação com altas potências-pico. O objetivo deste trabalho foi estudar configurações de cavidades ressonantes laser, que possibilitem a obtenção de pulsos chaveados Q e fu
Publicado em: 2008
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6. CRYSTALLINE FLUORIDE FIBER LASER AND CHARACTERIZATION OF RARE EARTH DOPED FIBERS / Laser de fibra monocristalina de fluoretos e caracterização de fibras dopadas com terras raras
Diode pumped solid state lasers have supplied a large part of the search for high power lasers, with good beam quality, in addition, these lasers are useful for generation of visible laser radiation. Fiber lasers have the capacity to reach these high powers with a good beam quality, due to its special design which confines the radiation through long fiber le
Publicado em: 2008
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7. "Investigação de Lasers de fluoreto dopados com Túlio e bombeados por diodo-Laser" / INVESTIGATION OF DIODE-LASER PUMPED THULIUM-DOPED FLUORIDE LASERS
Lasers sintonizáveis ao redor de 2,3 μm são interessantes para várias áreas, como detecção de gases, sensoriamento remoto e aplicações médicas. O túlio é o principal sistema entre os lasers de terras-raras com essa emissão e pode ser bombeado diretamente ou por meio de um sensibilizador como o itérbio. Neste trabalho, apresenta-se a obtenç
Publicado em: 2006
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8. Laser de faces clivadas com regiões ativas nanoestruturadas bombeados por injeção eletronica / Cleaved face laser with nanostructured active region pumped by electronic injection
This masters dissertation presents the theoretical studies on the calculation of optical gain in nanostructures based on the InGaAs/InGaAsP/InP system. From the time dependent perturbation theory, where perturbation is the interaction of an electromagnetic wave with matter, and the Kanes theory for semiconductors band structure, relating the transition m
Publicado em: 2006
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9. Optical Amplifiers for High Capacity Multichannel Communication Systems / Amplificadores Ãpticos para Sistemas de ComunicaÃÃo Multicanais de Alta Capacidade
The ever increasing demand for data traffic suggests the capacity expansion of optical communication systems. One can obtain this by increasing the number of transmitted channels in alternative optical bands. To achieve this it is necessary to develop optical amplifers for each band. The most common amplifiers are EDFA. Nevertheless, Raman amplifiers and TDF
Publicado em: 2005
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10. Caracterização espectroscópica de possíveis meios ativos para lasers de Nd3+ e Tm3+ / Spectroscopic characterization of possible Nd3+ and Tm3+ laser active media
In this work we have made an important contribution to the growing research of new laser materials that can be pumped by low cost diode lasers or by the Upconversion process to operate in the near-infrared and visible spectral regions. Three kinds of hosts, doped with the rare earth ions (Nd3+ and Tm3+) were studied, and they present potential characteristic
Publicado em: 2003
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11. Aplicações de fibras opticas na geração de pulsos opticos ultracurtos
We have investigated picosecond nonlinear processes in optical fibers and their applications to ultrashort light pulse generation. Several experiments were performed in which we studied the role of stimulated Raman scattering, self and cross-phase modulation combined with group velocity dispersion on the generation of u1trashort pulses. In the first experime
Publicado em: 1990