Zhang Bingtao, Wang Yong, Zhao Zigang, Yan Wei, Huo Mingming, Chen Guihuan
Appl Opt. 2020 Aug 1;59(22):6526-6533. doi: 10.1364/AO.394269.
/-co-doped phosphate glasses with modification (PLAZGs) were successfully prepared by the melt-quenching method. The phenomenological intensity parameters (=2, 4, 6) of the PLAZGs have been calculated by the Judd-Ofelt theory. Based on the phenomenological intensity parameters, the spectroscopic parameters of and fluorescence intensity ratio (FIR) of green upconversion emissions were estimated. It was observed that, under 980 nm excitation, all samples exhibit green and red upconversion emissions of . The 10 mol% modified phosphate glass has the strongest upconversion emission. Additionally, the fluorescence decays of the → transition of ions were measured to evaluate the energy transfer efficiency from to ions. Finally, the optical temperature sensing properties based on upconversion emissions were investigated at temperatures from 150 K to 600 K. The maximum absolute temperature sensitivity value of 6.0×10 at 400 K is obtained, which indicates that the glass is promising for temperature sensing application based on the FIR technology.
通过熔融淬火法成功制备了具有改性的/-共掺杂磷酸盐玻璃（PLAZGs）。利用Judd-Ofelt理论计算了PLAZGs的现象学强度参数（=2、4、6）。基于现象学强度参数，估算了绿色上转换发射的光谱参数和荧光强度比（FIR）。观察到，在980nm激发下，所有样品均表现出绿色和红色上转换发射。10mol%改性磷酸盐玻璃具有最强的上转换发射。此外，测量了离子→跃迁的荧光衰减，以评估从离子到离子的能量转移效率。最后，在150K至600K的温度范围内研究了基于上转换发射的光学温度传感特性。在400K时获得了6.0×10的最大绝对温度灵敏度值，这表明该玻璃在基于FIR技术的温度传感应用中具有潜力。
