中文摘要：

制备了一种稀土离子掺杂的PGETYA氟氧玻璃材料,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58.52PbF2-34.43GeO2-3Al2O3-0.05Tm2O3-4Yb2O3,以共掺杂Tm3＋和Yb3＋离子为上转换研究的对象。测量了该玻璃系统在980nmLD激发下的上转换发光光谱,观察到很强的476nm的蓝色荧光,它来源于Tm^3＋离子的1G4→3H6跃迁。同时,还有两个较弱的红色荧光来源于Tm^3＋离子的1G4→3H4和3F3→3H6跃迁。对上转换发光强度与泵浦电流关系曲线的拟合结果表明：此材料的蓝色上转换为三光子过程,红色上转换为双光子过程。

英文摘要：

Over the several passed decades, the upconversion luminescence of rare earths doped glasses has been attracted much interest due to its applications in short wavelength laser devices, three dimensional displays and optical storage sources. Therefore, exploring novel materials with high luminescent efficiency and good chemical and mechanical stability has become a challenge to the researchers. It has been of technical and applied importance to understand the mechanisms of the upconversion luminescence in the inorganic materials doped by rare earths.In this paper, a novel oxyfluoride glass sample PGETYA was p This glass system not only has the higher up-conversion 1 of both the oxide and fluoride host materials. The PGETYA efficiency, but also avoids the drawback sample consists of 58.52PbF2-34.43GeO2-3Al2 O3- 0.05Tm2O3-4Yb2O3 （in molar）, among which GeO2 is the main component, namely glass former, others are introduced as adjustors to improve the glass performance. Tm^3＋ and Yb^3＋ ions are doped as co-operative luminescent activators. The upconversion emission spectrum was measured under 980 nm excitation by using a semiconductor laser diode. Very strong blue upconversion emission at 476 nm originating from ^1G4→^3H6 transition of Tm^3＋ can be seen by naked eyes. Meanwhile two weaker red emissions originating from ^1G4→^3 H4 and ^3F3→^3H6 transitions of Tm^3＋ were also observed. Upconversion luminescence intensity variations with the increase of excitation density viz the increase of LD working currents were investigated. The nonlinear curve fittings of the relationship between the up-conversion emission intensity and LD working current to the theoretical result were carried out, and it was concluded that the blue up-conversion for this material is nicely fitting in with the three-photon process and red one fulfills the two-photon process. These results suggested that the studied oxyfluoride glass with the designed composition may be a good candidate material for the practical applications in sho