Quantum efficiencies and thermo-optical properties of Er~(3+)-, Nd~(3+)-, and Pr~(3+)-single doped lead-indium-phosphate glasses

摘要

The experimental determination of thermal and optical properties, such as the fluorescence quantum efficiency (η) and temperature coefficient of the optical path length change (ds/dT) have been a challenging task. In this work, mode-mismatched thermal lens and spectroscopic measurements were performed using Er~(3+)-, Nd~(3+)-, and Pr~(3+)-doped lead-indium-phosphate glasses to obtain the thermal diffusivity and conductivity, ds/dT, the thermal loading (nonradiative quantum efficiency), and η. The experimental difficulties associated with obtaining η for systems with several emitting levels, such as Er~(3+)-doped materials were overcome. A discussion of the implications of the small 77 values obtained for Er~(3+)- and Pr~(3+)-doped glass is presented.