Jonas Jakutis Neto

Instituto de Estudos Avançados da Universidade de São Paulo

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Niklaus Ursus Wetter

National Nuclear Energy Commission

Helen M. Pask

Macquarie University

Dimitri Geskus

LioniX (Netherlands)

Patrícia Bueno

Departamento de Ciência e Tecnologia

Marcelo Geraldo Destro

Instituto de Estudios Avanzados

Jhonatha Ricardo dos Santos

Instituto de Estudos Avançados da Universidade de São Paulo

José Wilson Neri

University of Lincoln

L.R.P. Kassab

Faculdade de Tecnologia de São Paulo

J.R. Martinelli

University of Groningen

N. A. S. Rodrigues

Instituto Tecnológico de Aeronáutica

Cooperative Institutions

Instituto Tecnológico de Aeronáutica

Universidade de São Paulo

Departamento de Ciência e Tecnologia

Instituto de Estudos Avançados da Universidade de São Paulo

Instituto de Pesquisas Energéticas e Nucleares

National Nuclear Energy Commission

Instituto de Estudios Avanzados

Universidade Federal do Tocantins

Universidade Estadual Paulista (Unesp)

Universidade Federal de São Paulo

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Características das carcaças e carne de tourinhos Nelore alimentados com níveis de concentrado e farelo do mesocarpo de babaçu

Arquivo Brasileiro de Medicina Veterinária e Zootecnia (2015)

Rossini Sôffa da Cruz Emerson Alexandrino Régis Luís Missio José Neuman Miranda Neiva João Restle

Avaliaram-se as características da carcaça e da carne de tourinhos Nelore alimentados com diferentes níveis de concentrado e farelo do mesocarpo do babaçu na dieta. Foram utilizados 28 tourinhos da raça Nelore, com idade inicial de 21 meses e 356,66±19,25kg de peso corporal inicial, distribuídos inteiramente ao acaso em dietas com dois níveis de concentrado (65 e 71%), associadas ou não à inclusão de 35% de farelo do mesocarpo do babaçu no concentrado. A elevação da fração concentrada na dieta de 65 para 71%, bem como a inclusão de 35% de farelo do mesocarpo do babaçu no concentrado, não alterou a quantidade de músculo, gordura e osso da carcaça, com valores médios de 63,91; 19,46 e 16,63% do peso de carcaça fria, respectivamente. O rendimento dos cortes comerciais secundários do traseiro especial não foi alterado pela inclusão de 35% de farelo do mesocarpo do babaçu no concentrado nem pelo teor de concentrado da dieta. A força ao cisalhamento das fibras musculares, a perda de líquido por descongelamento e cozimento não foram alteradas pelos fatores estudados, apresentando valores médios de 6,57kgf/cm3, 16,08% e 22,20%, respectivamente. O marmoreio aumentou (5,78 para 9,79 pontos) pelo avanço do nível de concentrado na dieta, mas não foi alterado pela inclusão do farelo do mesocarpo do babaçu. O farelo do mesocarpo do babaçu apresenta características nutricionais que possibilitam substituir parcialmente o milho em dietas com elevada proporção de concentrado, não alterando a composição física da carcaça e a qualidade da carne de tourinhos Nelore confinados.

10.1590/1678-6433

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Citations (4)

Measurement of Dysprosium Stark Width and the Electron Impact Width Parameter

Applied Spectroscopy (2018)

Jhonatha Ricardo dos Santos Jonas Jakutis Neto N. A. S. Rodrigues Marcelo Geraldo Destro José Wilson Neri

In this work, we suggest a methodology to determine the impact parameter for neutral dysprosium emission lines from the characterization of the plasma generated by laser ablation in a sealed chamber filled with argon. The procedure is a combination of known consistent spectroscopic methods for plasma temperature determination, electron density, and species concentration. With an electron density of 3.1 × 10 18 cm –3 and temperature close to 10 4 K, we estimated the impact electron parameter for nine spectral lines of the neutral dysprosium atom. The gaps in the impact parameter data in the literature, mainly for heavy elements, stress the importance of the proposed method.

Dysprosium

Electron temperature

Laser Ablation

10.1177/0003702818807923

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Citations (5)

Effect of the ytterbium concentration on the upconversion luminescence of Yb3+/Er3+ co-doped PbO–GeO2–Ga2O3 glasses

Journal of Non-Crystalline Solids (2008)

F.A. Bomfim J.R. Martinelli L.R.P. Kassab Niklaus Ursus Wetter Jonas Jakutis Neto

Photon Upconversion

Ytterbium

Emission intensity

Laser diode

10.1016/j.jnoncrysol.2008.04.033

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Citations (44)

Increased Er3+ upconversion in tellurite fibers and glasses by co-doping with Yb3+

Optical Materials (2010)

Jonas Jakutis Neto L.A. Gomes Carlos Taveira Amâncio L.R.P. Kassab J.R. Martinelli

Photon Upconversion

Laser diode

10.1016/j.optmat.2010.08.021

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Citations (38)

Generation of combs of wavelengths in the infrared and visible using cascaded stimulated Raman scattering in potassium titanyl phosphate

Andrew Lee Jonas Jakutis Neto Helen M. Pask

We report the generation of a comb of emission wavelengths in the near-infrared, and wavelength-tunable emission at up to five discrete wavelengths in the visible between 534 nm and 572 nm by making use of cascaded stimulated Raman scattering in potassium titnyl phosphate in combination with Nd:GdVO ₄ and Nd:YLF laser crystals.

Potassium titanyl phosphate

10.1109/iqec-cleo.2011.6193772

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Citations (1)

Comparison of grazing incidence Nd:YVO4 lasers pumped at 808 and 880 nm

Advanced Solid-State Lasers Congress (2013)

Cristine Calil Kores Jonas Jakutis Neto Niklaus Ursus Wetter

We compare, for the first time to the best of our knowledge, the behavior of a grazing incidence Nd:YVO4 laser when pumped at 808 nm and when directly pumped at 880 nm. We report a more linear behavior of the output power as a function of input power under direct pumping, due to a decrease in thermal effects.

Optical Pumping

10.1364/assl.2013.atu3a.10

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Citations (3)

Extreme linewidth broadening in a Nd : YLiF4-KGW intracavity Raman laser

Conference on Lasers and Electro-Optics (2015)

Dimitri Geskus Jonas Jakutis Neto David J. Spence Helen M. Pask Niklaus Ursus Wetter

Raman lasers are recognized for their wavelength flexibility, providing emission ranging from infrared pulsed lasers to continuous wave (cw) intracavity frequency converted Raman lasers operating in the visible wavelength range [1-4]. Broadening of the fundamental laser line in intracavity Raman lasers has been observed and it influence on the efficiency has been studied [5].

Laser linewidth

Raman laser

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Citations (2)

Investigation of blue emission from Raman-active crystals: Its origin and impact on laser performance

Optical Materials Express (2014)

Jonas Jakutis Neto Christopher Artlett Andrew Lee Jipeng Lin David J. Spence

The origin and consequences to laser performance of blue emission observed in some Raman crystals has been studied in detail, leading us to attribute the origin of the phenomenon to fluorescence from Tm3+(1G4) impurity ions which are excited via sequential upconversion. For the specific case of a Nd:YLF/KGW Raman laser, we show that the blue fluorescence has modest but significant impacts on laser performance and thermal loading. If the blue fluorescence was eliminated, then laser efficiency could be increased by 15% and thermal loading in the KGW crystal reduced by 17%.

Photon Upconversion

Crystal (programming language)

Blueshift

Raman laser

10.1364/ome.4.000889

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Citations (17)

Ten deep blue to cyan emission lines from an intracavity frequency converted Raman laser

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2015)

Dimitri Geskus Jonas Jakutis Neto Helen M. Pask Niklaus Ursus Wetter

Here we report on the generation of ten deep blue to cyan laser emission lines using an intracavity frequency converted Raman laser. The fundamental laser field of the intracavity Raman laser is based on the 3 level transition of a Nd:YLF laser crystal, providing a short wavelength at 903 or 908 nm. When combined with generation of a Stokes shifted field via intracavity stimulated Raman scattering (SRS) by a KGW Raman crystal, enables generation of laser emission in the deep blue to cyan wavelength regime via additional nonlinear frequency conversion. Output at several blue-green wavelengths was achieved, with quasi continuous wave (qcw) output powers of up to 1W. A detailed study of the spectral behavior of the underlying Raman laser processes revealed strong spectral broadening of the fundamental laser line at 908 nm to a width of up to 4 nm. The effect of the spectral broadening on the overall laser efficiency is analyzed.

Cyan

Raman laser

10.1117/12.2077790

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Citations (2)

First Observations of Rare-Earth Isotope Enrichment by Atomic Vapor Laser Separation in Brazil

Latin America Optics and Photonics (LAOP) Conference 2022 (2022)

Jonas Jakutis Neto Patrícia Bueno Jhonatha Ricardo dos Santos Carlos André Balthazar da Silveira N. A. S. Rodrigues

Modern technologies depend on Rare-Earth elements, and they can be further improved using isotopic enriched/pure materials. This work brings the first successful attempt to enrich 163 Dy by AVLIS (Atomic Vapor Laser Isotope Separation) in Brazil.

10.1364/laop.2022.m2d.3

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