Concentration quenching mechanism in erbium-doped tellurite glass

测试了掺铒碲酸盐玻璃在不同掺杂浓度下的荧光特性．根据Dexter能量转移理论计算了Er^3+在碲酸盐玻璃中发生浓度猝灭的临界距离R0及Er^3+间相互作用参数CEr-Er，并与其他基质玻璃中CEr-Er数值进行了比较．最后建立了Er^3+基于OH^-作为猝灭中心下碲酸盐玻璃中的浓度猝灭模型．The fluorescence properties of Er3+ : I-4(13/2) -> I-4(15/2) transition in tellurite glasses have been investigated as a function of the Er3+ concentration. The critical distance R-0 for which concentration quenching will happen, and the interaction microparameter CEr-Er in tellurite glasses were determined on the basis of the energy migration model of Dexter theory. The value of CEr-Er in the proposed tellurite glass was compared with that in other glass hosts. Finally, the concentration quenching mechanism described using a model based on energy transfer and quenching by hydroxyl groups was presented