MELO, PEDRO B. dos S.SAMAD, RICARDO E.MOTTA, CLAUDIO C.2023-01-262023-01-26MELO, PEDRO B. dos S.; SAMAD, RICARDO E.; MOTTA, CLAUDIO C. A solution of an YDFA in tandem-pumping configuration with ASE using RK4 method. In: SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE, October 13-15, 2022, Recife, PE. <b>Proceedings...</b> Piscataway, NJ, USA: IEEE, 2022. DOI: <a href="https://dx.doi.org/10.1109/SBFotonIOPC54450.2022.9992809">10.1109/SBFotonIOPC54450.2022.9992809</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/33671.http://repositorio.ipen.br/handle/123456789/33671A new solution for a tandem amplifier is presented using a fiber doped with ytterbium and a core coating ratio of 30/250 and which incorporates the solution of the rate equations with the amplified spontaneous emission characteristic in these multi-kilowatt systems. The model describes in a more precision way the behavior of a fiber amplifier with a 5. 986kW,1018nm pumping and a signal seed of 75W, 1080nm, solving the propagation and rate equations using the fourth-order Runge-Kutta as well the relaxation methods as a convergence criterion for the integrations.openAccessdoped materialsytterbiumoptical fibersequationsrunge-kutta methodTexto completo de evento10.1109/SBFotonIOPC54450.2022.99928090000-0001-7762-8961https://orcid.org/0000-0001-7762-8961