Xu Beibei, Tan Dezhi, Zhou Shifeng, Hong Zhanglian, Sharafudeen Kaniyarakkal N, Qiu Jianrong
State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China.
Opt Express. 2012 Dec 17;20(27):29105-11. doi: 10.1364/OE.20.029105.
Broadband near-infrared luminescence covering 900 to 1600 nm has been observed in Bi-doped oxyfluoride silicate glasses. The partial substitution of fluoride for oxide in Bi-doped silicate glasses leads to an increase of the intensity and lifetime of the near-infrared luminescence and blue-shift of the near-infrared emission peaks. Both Bi-doped silicate and oxyfluoride silicate glasses show visible luminescence with blue, green, orange and red emission bands when excited by ultra-violet light. Careful investigation on the luminescence properties indicates that the change of near-infrared luminescence is related to optical basicity, phonon energy of the glass matrix and crystal field around Bi active centers. These results offer a valuable way to control the luminescence properties of Bi-doped materials and may find some applications in fiber amplifier and fiber laser.
在掺铋氟氧化物硅酸盐玻璃中观察到了覆盖900至1600纳米的宽带近红外发光。在掺铋硅酸盐玻璃中用氟部分替代氧化物会导致近红外发光强度和寿命增加以及近红外发射峰蓝移。当用紫外光激发时，掺铋硅酸盐玻璃和氟氧化物硅酸盐玻璃均显示出具有蓝、绿、橙和红发射带的可见发光。对发光特性的仔细研究表明，近红外发光的变化与玻璃基体的光学碱度、声子能量以及铋活性中心周围的晶体场有关。这些结果为控制掺铋材料的发光特性提供了一种有价值的方法，并可能在光纤放大器和光纤激光器中找到一些应用。
