Chen Fangze, Xu Shaoqiong, Wei Tao, Wang Fengchao, Cai Muzhi, Tian Ying, Xu Shiqing
Appl Opt. 2015 Apr 10;54(11):3345-52. doi: 10.1364/AO.54.003345.
This paper reports on the spectroscopic and structural properties in Er(3+)-doped oxyfluorotellurite glasses. The compositional variation accounts for the evolutions of Raman spectra, Judd-Ofelt parameters, radiative properties, and fluorescent emission. It is found that, when maximum phonon energy changes slightly, phonon density plays a crucial role in quenching the 2.7 μm emission generated by the Er(3+):(4)I11/2→(4)I13/2 transition. The comparative low phonon density contributes strong 2.7 μm emission intensity. The high branching ratio (18.63%) and large emission cross section (0.95×10(-20) cm(2)) demonstrate that oxyfluorotellurite glass contained with 50 mol.% TeO2 has potential application in the mid-infrared region laser.
本文报道了掺铒氧氟碲酸盐玻璃的光谱和结构特性。成分变化解释了拉曼光谱、贾德-奥费尔特参数、辐射特性和荧光发射的演变。研究发现，当最大声子能量略有变化时，声子密度在猝灭由Er(3+):(4)I11/2→(4)I13/2跃迁产生的2.7μm发射中起关键作用。相对较低的声子密度有助于产生较强的2.7μm发射强度。高分支比（18.63%）和大发射截面（0.95×10(-20) cm(2)）表明，含有50 mol.% TeO2的氧氟碲酸盐玻璃在中红外区域激光方面具有潜在应用。
