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

2.0μm spectroscopy of a new germanate-tellurite glass with Ho<sup>3+</sup>/Yb<sup>3+</sup> codoping is synthesized and analyzed. Efficient 2.0μm emission of Ho<sup>3+</sup> ions sensitized by Yb<sup>3+</sup> ions from the host glass is observed under 980nm pumping. The maximum emission cross section of Ho<sup>3+</sup> ions transition is 4.32×10<sup>-21</sup> cm<sup>2</sup> around 2.0μm. The good spectroscopic properties and the efficient energy transfer from Yb<sup>3+</sup> to Ho<sup>3+</sup> suggest that Ho<sup>3+</sup>/Yb<sup>3+</sup> codoped germanate-tellurite glass may become an attractive host for developing solid state lasers operating in the mid-infrared.