Up-conversion Luminescence of Fluoro-oxide Glass Co-doped with Er~(3+) and Yb~(3+) under 980 nm Excitation
CHENG Li-hong, CAO Wang-he, XIA Tian(Department of Mathematics and Physics, Dalian Maritime University, Dalian 116023,China)
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.
【CateGory Index】： O482.31