2.7 μm emission of Nd3+, Er3+ codoped tellurite glass

In this paper, we report on the observation of enhanced 2.7 mu m midinfrared emission under 800 nm excitation in a Nd3+/Er3+ codoped tellurite glass. It is also found that the green upconversion emissions from Er3+ are effectively restricted, meanwhile the I-4(13/2) level of Er3+ is depopulated in the Nd3+/Er3+ codoped tellurite glass. These results suggest that the midinfrared emission can be achieved in the oxyfluoride glasses and that codoping with Nd3+ can greatly improve the midinfrared emission performance. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3251345]