980nm激光激发下Er3+和Yb3+共掺杂氟氧玻璃的上转换发光

制备了一种新型的上转换发光材料,它不仅具有较高的上转换发光效率,而且还避免了氟化物基质的缺点。其组分为58.52%PbF₂-34.43% GeO₂-3% Al₂O₃-0.05% Er₂O₃-4%Yb₂O₃,其中GeO₂为玻璃形成体氧化物,PbF₂和Al₂O₃为调整剂,以共掺杂Er³⁺和Yb³⁺离子为上转换研究的对象。测量了该玻璃系统在980nm半导体激光器激发下的上转换发光光谱,观察到很强的658nm的红光和548,526nm的绿光,而且红光的发射强度远远强于绿光。通过对上转换发光强度与激发强度关系曲线的拟合,表明此材料的绿光发射和红光发射都为双光子过程。研究了激发光的工作电流与上转换荧光强度的关系,讨论了其上转换发光特性。

Up-conversion Luminescence of Fluoro-oxide Glass Co-doped with Er3+ and Yb3+ under 980 nm Excitation

A kind of up-conversion luminescence material with new composition was prepared, the material not only has the higher up-conversion luminescence efficiency, but also avoids the defect of fluoride host material. It consists of 58.52%PbF_2-34.43%GeO_2 -3%Al_2O_3 -0.05%Er_2O_3 -4%Yb_2O_3, among which GeO_2 acts as the oxide of glass formation, PbF_2 and Al_2O_3 act as the regulator, and co-doped Er~(3+) and Yb~(3+) ions are taken as the objects of up-conversion investigation. The up-conversion emissive spectra were measured under 980 nm excitation using a semiconductor laser diode, the very strong red light of 658 nm and green light of 548 nm and 526 nm can be observed. Moreover, the red light emissive intensity is far stronger than that of the green light one. A nonlinear curve fitting to the relationship between up-conversion emissive intensity and excitation light power was made, it is concluded that both red emission and green emission are the absorption process of double-photon. The relationship between the operation current of 980 nm laser diode and up-conversion fluorescence intensity was investigated, and the up-conversion luminescence characteristic was discussed.