BERECZKI, A.PAES, JOAO P.F.WETTER, NIKLAUS U.KUDRYASHOV, ALEXIS V.PAXTON, ALAN H.ILCHENKO, VLADIMIR S.ARMANI, ANDREA M.2020-10-282020-10-28BERECZKI, A.; PAES, JOAO P.F.; WETTER, NIKLAUS U. Three-level Nd:YLF Raman laser directly pumped by a beam shaped diode bar. In: KUDRYASHOV, ALEXIS V. (ed.); PAXTON, ALAN H. (ed.); ILCHENKO, VLADIMIR S. (ed.); ARMANI, ANDREA M. (ed.). In: SPIE PHOTONICS WEST; SPIE LASE, February 1-6, 2020, San Francisco, USA. <b>Proceedings...</b> Washington, USA: SPIE, 2020. p. 1126614-1 - 1126614-8. (Proceedings SPIE 11266, Laser Resonators, Microresonators, and Beam Control XXII). DOI: <a href="https://dx.doi.org/10.1117/12.2544844">10.1117/12.2544844</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31560.http://repositorio.ipen.br/handle/123456789/31560Low heat generation can be obtained when pumping Nd:YLF at wavelengths of 872 nm and 880 nm and emitting at the three-level transition of 908 nm. These transitions show very low quantum defect with efficiencies of 0.96 and 0.97, respectively. However, the low average absorption cross-section at these wavelengths makes efficient absorption even for longitudinal pump setups difficult. Using a beam-shaped pump diode instead of a fiber-coupled diode bar may be an effective means of increasing absorption because it can provide for π-polarized radiation which shows higher absorption cross section. In this work, a Nd:YLF was pumped at 872 nm by a diode bar using beam-shaping. Results were compared to pumping at 872 and 880 nm with non-polarized fiber-coupled diodes. Stimulated Raman scattering was also obtained with a KGW crystal generating first Stokes emissions at 990 nm and 976 nm.1126614-1 - 1126614-8closedAccesslaser radiationraman spectraneodymium lasersyttriumlithiumbeam shapingenergy levelsTexto completo de evento10.1117/12.25448440000-0002-9379-9530https://orcid.org/0000-0002-9379-9530