Single Frequency Lasers
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Coherent and incoherent radiation from free-electron lasers with an axial guide field
The spontaneous and induced emission from a free-electron laser is treated for the case in which an axial magnetic field is imposed in addition to the helical, axially periodic wiggler magnetic field. The classes of possible single-particle trajectories in this configuration are discussed, and the results are applied to a calculation of the incoherent radiat
Publicado em: 2011
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2. Lasers de frequência única de Nd:YIF e Nd:YVO4 na região do vermelho / Single frequency Nd:YLF and Nd:YVO4 laser in the red emission
Lasers de estado sólido sintonizáveis com uma estreita largura de linha de emissão na região do vermelho são uma alternativa conveniente aos lasers de corante para aplicações em espectroscopia de alta resolução. Nesse trabalho, foram investigados lasers contínuos de Nd:YLiF4 e Nd:YVO4 operando em frequência única na região de 1,32 - 1,34μm, a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/07/2010
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3. Efeitos coerentes no acoplamento dos lasers de fentosegundo e de diodo em vapor de rubÃdio
Mode-locked, phase-stabilized femtosecond (fs) lasers with high-repetition rate produce a frequency standard composed by a great number of narrow modes, known as frequency comb. The interaction of inhomogeneously broadened two-level systems with a train of fs pulses, for the case in which the atomic relaxation times are longer than the laser repetition perio
Publicado em: 2008
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4. Influence of cavity preparation method, high speed turbine and Er:YAG laser, on hybrid layer thickness of different adhesive systems / Influência do método de preparo cavitário, alta rotação e laser de Er:YAG, sobre a espessura da camada híbrida de diferentes sistemas adesivos, com diferentes filosofias adesivas
The objective of this study was to compare the thickness of the hybrid layer formed using Scotchbond Multipurpose Plus, Single Bond 2, Prime &Bond 2.1 and Xeno III on dentine surface, prepared with a diamond bur in a high speed handpiece, or prepared with an Er:YAG laser, used with two parameters of pulse energy (200 and 400 mJ) and two parameters of frequen
Publicado em: 2006
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5. Projeto e construção de um laser de Ti : safira continuo, sintonizavel, com frequencia unica e estabilizada a uma cavidade-externa de referencia / Project and construction of a cw, single-frequency and tunable Ti : Sapphire laser, actively stabilized to the resonance of an external reference cavity
Este trabalho apresenta o projeto e construção de um laser de Tirsafira (safira dopada com titânio) sintonizável, operando em regime contínuo, de freqüência única e estabilizada à ressonância de uma cavidade externa de referência. Descrevemos os componentes do laser: cristal de Ti:Safira, cavidade óptica em anel, diodo óptico, filtro birrefringe
Publicado em: 2001
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6. Photoacoustic technique to measure beam profile of pulsed laser systems
The beam profiles of pulsed lasers are currently measured using either complementary metal oxide semiconductor (CMOS) or charge coupled device (CCD) cameras. Despite providing high-resolution beam profiles, these devices cannot work with high power lasers. If additional optical attenuators are used, beam distortions may occur. In this paper we demonstrate a
American Institute of Physics.
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7. Excitation transfer spectroscopy with two metastable 138Ba+ ions in same trap.
In the absence of lasers approaching trapped ion clock transitions in sharpness we propose to replace the 12.49 m laser field exciting the D3/2-D5/2 transition of the single Ba+ ion A in D3/2 with the near-field of a close by identical ion B in the excited D5/2 state. We tune the frequency of the near-field by the differential Stark shift generated when the
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8. Theory of light quenching: effects of fluorescence polarization, intensity, and anisotropy decays.
Experimental studies have recently demonstrated that fluorescence emission can be quenched by laser light pulses from modern high repetition rate lasers, a phenomenon we call "light quenching." We now describe the theory of light quenching and some of its effects on the steady-state and time-resolved intensity and anisotropy decays of fluorophores. Light que