Qi Fangwei, Huang Feifei, Wang Tao, Tian Ying, Lei Ruoshan, Ye Renguang, Zhang Junjie, Zhang Long, Xu Shiqing
Appl Opt. 2017 Nov 1;56(31):H24-H29. doi: 10.1364/AO.56.000H24.
Enhanced 3 μm luminescence of Dy based on the effective process of Yb:F2→Dy:H6 with a higher energy transfer coefficient of 7.36×10 cm/s in fluoaluminate glass modified by TeO was obtained. The energy transfer efficiency from Yb to Dy in Dy/Yb codoped glass was as high as 80%, indicating the effective energy transfer of Yb. The higher temperature of the glass transition (T) and larger characteristic temperatures (ΔT,K) revealed better thermal properties of the prepared glasses compared with the traditional fluoaluminate glasses, which is of great benefit to fiber drawing. The lower hydroxyl content (15.7 ppm) indicated better fluorescence properties of the glass. It was noted that the longer lifetime of 572 μs and higher emission cross section of 5.22×10 cm along with the bandwidth of 245 nm around 3 μm proved potential applications in mid-IR laser materials of the present glass.
通过TeO改性的氟铝酸盐玻璃中Yb:F₂→Dy:H₆的有效过程，获得了基于Dy的增强型3μm发光，其能量转移系数更高，为7.36×10 cm/s。Dy/Yb共掺杂玻璃中从Yb到Dy的能量转移效率高达80%，表明Yb的能量转移有效。与传统氟铝酸盐玻璃相比，所制备玻璃的玻璃转变温度（T）更高，特征温度（ΔT，K）更大，显示出更好的热性能，这对拉丝非常有利。较低的羟基含量（15.7 ppm）表明玻璃具有更好的荧光性能。值得注意的是，572 μs的较长寿命、5.22×10 cm的较高发射截面以及3μm附近245 nm的带宽证明了这种玻璃在中红外激光材料中的潜在应用。
