Tm^(3+)离子掺杂氟铝酸盐玻璃红外及上转换光谱性质

IR Emission and Frequency Upconversion in Tm^(3+) Doped Fluoroaluminate Glass

制备了Tm3 +掺杂氟铝酸盐玻璃 ,以实测的吸收光谱使用Judd Ofelt理论详细计算了Tm3 +在氟铝酸盐玻璃中的光谱参数 ,在此基础上研究了Tm3 +离子掺杂氟铝酸盐玻璃的上转换光谱性质和红外光谱性质。研究表明 :在 80 0nm激光二极管激发下 ,1.45 μm(3 F4→3 H4)荧光浓度猝灭要明显强于 1.77μm(3 H4→3 H6)荧光 ;在 6 5 5nm激发下上转换荧光主要是由单个Tm3 +离子的步进二光子吸收过程所致。

The fluoroaluminate glasses doped with Tm 3+ were prepared. The spectroscopic parameters have been calculated for Tm 3+ doped fluoroaluminate (AYF) glass based on the measured absorption spectra using Judd-Ofelt theory. IR emission and frequency upconversion of Tm 3+ doped fluoroaluminate glass were investigated. The results show that the concentration quenching is more significant for 1.45 μm-emission ( 3F 4→ 3H 4) than for 1.77 μm-emission ( 3H 4→ 3H 6) under the 800 nm excitation. The mechanism of upconversion, excited at 655 nm, was proved to be a simple excited state absorption (ESA) process.