Ho 3+ /Yb 3+ codoped silicate glasses for 2 μm emission performances

This paper discuss a series of Ho3+/Yb3+ codoped silicate glasses prepared by the melting method. 2 μm emissions of the samples are observed under the pump of 980 nm LD. The Judd-Ofelt parameters (Ωλ) and radiative properties are calculated and analyzed; the spontaneous transition probability can reach 78.71  s−1. From the fluorescence spectra, the peak absorption and emission cross section of Ho3+ are 2.36×10−21 and 5.05×10−21  cm2, respectively. In addition, we analyze the energy transfer process of Yb3+:  F5/22 level to Ho3+:  I65 level. Considering the luminance properties and good thermal property, we indicate that Ho3+/Yb3+ codoped silicate glass is a potential laser glass for the efficient 2 μm laser.