Ding Wenlong, Zhang Xiaosong, Li Lan, Ding Qi, Wu Shaohua, Yu Shuili, Zhang Jiajia
Appl Opt. 2018 Jul 1;57(19):5380-5384. doi: 10.1364/AO.57.005380.
A series of erbium-doped fluoro-bromozirconate glasses modified by various concentrations of Br was prepared using the melt-quenching method. The mid-infrared fluorescence intensity (2.7 μm) was improved by increasing the content of Br. The differential scanning calorimetry, x-ray diffraction, Fourier-transform infrared spectra, Raman spectra, and mid-infrared luminescence spectra were measured. The decreased phonon density shows that the structural changes due to inserting Br can enhance the mid-infrared luminescent intensity. From the Judd-Ofelt analysis, it was found that the intensity of Ω was enhanced with the introduction of Br and shows greater asymmetry and stronger covalency. Using the Fuchtbauer-Ladenburg theory and McCumber theory, the emission cross section (2.9×10 cm) and absorption cross section (1.68×10 cm) at 2.7 μm were determined. Hence, erbium-doped fluoro-bromozirconate glass is a potential material for application in the mid-infrared region.
采用熔融淬火法制备了一系列不同Br浓度修饰的掺铒氟溴锆酸盐玻璃。通过增加Br含量提高了中红外荧光强度（2.7μm）。测量了差示扫描量热法、X射线衍射、傅里叶变换红外光谱、拉曼光谱和中红外发光光谱。声子密度降低表明，由于插入Br引起的结构变化可以增强中红外发光强度。通过Judd-Ofelt分析发现，随着Br的引入，Ω强度增强，表现出更大的不对称性和更强的共价性。利用Fuchtbauer-Ladenburg理论和McCumber理论，确定了2.7μm处的发射截面（2.9×10 cm）和吸收截面（1.68×10 cm）。因此，掺铒氟溴锆酸盐玻璃是一种潜在的应用于中红外区域的材料。
