Dy3+单掺和Er3+,Yb3+共掺氧氟微晶玻璃的发光性能

采用高温熔融法和热处理工艺制作了含有GdF3纳米晶的氧氟微晶玻璃。在386 nm激发下,Dy3+掺杂氧氟微晶玻璃的发光强度明显增强,且蓝光对黄光的发光强度比逐渐增大,表明Dy3+已进入到GdF3纳米晶中。在980 nm激光器泵浦下,Er3+,Yb3+共掺氧氟微晶玻璃的上转换发光随着热处理温度的升高明显增强,Er3+的上转换发光出现明显的Stark分裂现象,这亦说明Er3+已进入到GdF3纳米晶相中。通过研究上转换发光强度与泵浦功率的关系,确定绿光上转换发光为双光子过程。

Photoluminescence Properties in Dy3+-doped and Er3+,Yb3+ Co-doped Oxyfluoride Glass Ceramics

The transparent oxyfluoride glass ceramics containing GdF 3 nanocrystals were prepared by high-temperature melting and heat treatment method.Comparison with the as-prepared glass,Dy 3 + doped oxyfluoride glass ceramics exhibit higher emission intensity excited at 386 nm and the intensity ratio between blue light and yellow light emission increases gradually with the heat treatment temperature,which indicates that Dy 3 + ions have participated into the precipitated GdF 3 nanocrystals.Under the excitation of 980 nm laser diode,the upconversion luminescence intensity increases gradually with the heat treatment temperature and the upconversion luminescence peaks appear apparent Stark splitting phenomenon,which also demonstrates Er 3 + ions have entered into the precipitated GdF 3 nano-crystalline phase.Based on the relationship between excited power and the upconversion intensity in Er 3 +,Yb 3 + doped glass ceramic GC-650,two-photon absorption process was determined for the green upconversion emission of Er 3 +.