2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/158689We report on 33 % efficient generation of the first Stokes in a high concentration GeO2 fiber Raman laser pumped by a 22 W Thulium doped fiber laser. An output power of 4.6 W at 2.105 um is demonstrated.6 pages, 4 figures. Final version in line with published paper. Includes one extra reference, minor changes to text and additional results as a note at the endOpticstext