2.0µm emission property of Ho3+/Yb3+ codoped germanate-tellurite glasses

2.0μm spectroscopy of a new germanate-tellurite glass with Ho³⁺/Yb³⁺ codoping is synthesized and analyzed. Efficient 2.0μm emission of Ho³⁺ ions sensitized by Yb³⁺ ions from the host glass is observed under 980nm pumping. The maximum emission cross section of Ho³⁺ ions transition is 4.32×10^-21 cm² around 2.0μm. The good spectroscopic properties and the efficient energy transfer from Yb³⁺ to Ho³⁺ suggest that Ho³⁺/Yb³⁺ codoped germanate-tellurite glass may become an attractive host for developing solid state lasers operating in the mid-infrared.