Infrared and upconversion spectroscopic studies of high Er^3+content transparent YAG ceramic

Abstract

In this article, we report the detailed spectroscopic studies of high Er 3+ content (50%) transparent YAG ceramic co-doped with nominal Cr 3+ content (0.1 mol %).Various radiative and non-radiative spectroscopic properties such as radiative decay time, fluorescence branching ratio, emission/absorption cross sections, internal radiative quantum yields of the infrared and the upconverted emission bands are explored using standard experimental and theoretical methods and compared with YAG single crystal.Results show that although the non-radiative losses are high for 50% Er doped ceramic; several radiative spectral properties are almost in agreement with those for the single crystal YAG.Furthermore, because of the low dopant concentration of Cr 3+ , the sensitizing effect of Cr 3+ was not observed.