MELO, PEDRO B. dos S.SAMAD, RICARDO E.MOTTA, CLAUDIO C.2021-11-122021-11-12MELO, PEDRO B. dos S.; SAMAD, RICARDO E.; MOTTA, CLAUDIO C. Analytical formulation of an Yb-doped tandem-pumping fiber amplifier. In: SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE, May 31 - June 2, 2021, Online. <b>Proceedings...</b> Piscataway, NJ, USA: IEEE, 2021. DOI: <a href="https://dx.doi.org/10.1109/SBFOTONIOPC50774.2021.9461980">10.1109/SBFOTONIOPC50774.2021.9461980</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/32329.http://repositorio.ipen.br/handle/123456789/32329An analytical formulation of a multi-kilowatt ytterbium-doped double-cladding tandem-pumped fiber amplifier was developed and is reported in this paper. The model consists of a system including the laser rate, pumping and seed power equations. The model was validated by describing a fiber amplifier behavior with a 5.986kW, 1018nm pumping and a signal seed of 75W, 1080nm, yielding a maximum power output of 5.448kW, with an efficiency of 91.1%. The thermal equations are solved for the temperature distribution along the fiber with a maximum temperature of 43.24°C, when the convective coefficient of 4000W. m-2. K -1 is used.openAccessoptical fiberspower rangeytterbiumlasersoptical pumpingequationsTexto completo de evento10.1109/SBFOTONIOPC50774.2021.94619800000-0001-7762-8961https://orcid.org/0000-0001-7762-8961