MERILYN SANTOS FERREIRA
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Resumo IPEN-doc 26764 Yellow laser at 573 nm generated by intracavity SHG diodeside-pumped Raman laser2019 - FERREIRA, MERILYN S.; PASK, HELEN M.; WETTER, NIKLAUS U.A diode side-pumped Nd:YLiF4 crystal for fundamental wavelength generation and intracavity Stokes conversion in KGW are employed to obtained 6.1W maximum output power, 11.9% slope efficiency and 11.8% diode-to-yellow conversion efficiency at 573 nm.Resumo IPEN-doc 25014 Laser Raman intracavidade de Nd:YLF/KGW bombeado lateralmente emitindo em 1147 e 1163 nm2017 - FERREIRA, MERILYN; PASK, HELEN; WETTER, NIKLAUS U.Foi investigado neste trabalho um laser Raman intracavidade de Nd:YLF/KGW na configuração de bombeio lateral. Para a geração do laser fundamental foi usado um cristal de Nd:YLF bombeado por um diodo, emitindo em 792 nm, na configuração lateral gerando um comprimento de onda de 1053 nm. Como cristal Raman foi usado um KGW bombeado em suas duas linhas Raman principais, 768 cm-1 e 901 cm-1, conseqüentemente gerando dois comprimentos de onda Raman, 1147 e 1163 nm, respectivamente. Dentro da cavidade a densidade de potência do laser fundamental é muito alta, desta maneira a configuração Raman intracavidade irá produzir uma conversão Raman mais eficiente [1]. Aliando-se a isso as boas características do Nd:YLF em configuração lateral [2] fomos capazes de gerar uma potência de saída em 1163 nm de 4,85W em regime multímodo, correspondendo à uma eficiência diodo-Raman de 12,2%, a eficiência diodo-Raman em modo TEM00 alcançou 7,5%. Para a emissão em 1147 nm foi atingido 1,47W de potência de saída com uma eficiência diodo-Raman de 3,7%. Até o momento não encontramos um laser Raman intracavidade de Nd:YLF/KGW em bombeio lateral reportado na literatura.Artigo IPEN-doc 24816 Intracavity diode-side-pumped Raman laser at 1147 nm and 1163 nm2018 - FERREIRA, MERILYN S.; PASK, HELEN M.; WETTER, NIKLAUS U.Wavelengths in the yellow-orange range are of significant interest due to their application potential in the medical and biomedical areas, as well as for applications in laser displays and in remote sensing. These wavelengths can be obtained by frequency-doubling or sum-frequency generation of lasers with near-IR emission like VCSELS, fiber lasers, and OPOs. However, all these alternatives have several limitations that justify the development of alternative methods. As a possible solution for these limitations, a configuration of an intracavity converted Raman laser may be developed to obtain two wavelengths, 1163 nm, and 1147 nm, with high efficiency and good beam quality. This paper presents a configuration of a side-pumped intracavity converted Raman laser to achieve these objectives. A Nd:YLiF4 crystal was used as fundamental wavelength gain crystal. The side-pumped configuration guarantees practicability and cost reduction while allowing good efficiency and fundamental mode laser beam. The intracavity conversion configuration allows high fundamental wavelength power at the Stokes crystal in order to facilitate the obtention of the Stokes wavelengths and enables optimization of its efficiency. As a result an output power at 1163 nm of 3.8 W in the multimode regime was obtained, corresponding to a pump to Stokes efficiency of 9.6%. The TEM00 diode to Stokes efficiency was 7%. For the emission at 1147 nm, 1.5W of output power with a diode to Stokes efficiency of 3.7% was achieved. The side-pumped Nd:YLF/KGW intracavity Raman laser configuration is reported for the first time, to our knowledge.