Continuously tuned (Tm0.05Sc0.252Y0.698)(2)O-3 ceramic laser with emission peak at 2076 nm

We report on the first laser action of a (Tm0.05Sc0.252Y0.698)2O3 ceramic sample, which was made by solidstate vacuum sintering of laser-ablated mixed sesquioxide nanoparticles. Pumped at 793 nm in quasi-CW mode, it delivers 1.24 W with a slope efficiency of 9.45% at 2076 nm. We have measured the absorption spectra at several temperatures, from 93 K to 293 K, calculating the absorption coefficients by Lambert-Beer formula. Moreover, emission cross sections were calculated by Fuchtbauer-Ladenburg starting from the fluorescence spectra measured at room temperature. Spectroscopic data where compared with those obtained by (Tm0.05Y0.95)2O3 fabricated with the same method. Finally, the ceramic tunability was explored finding a tuning range as broad as 181 nm (from 1927.5 nm to 2108.5 nm). (c) 2021 Published by Elsevier B.V.