2.7 μm fluorescence radiative dynamics and energy transfer between Er 3+ and Tm 3+ ions in fluoride glass under 800 nm and 980 nm excitation

Abstract

A detailed study of the fluorescence radiative dynamics and energy transfer processes between Er and Tm ions in the Er 3+/Tm 3+ doped fluoride glass is reported. The fluorescence properties of 2.7 μm emission, other infrared and visible emissions are investigated under different selective laser excitations. Three Judd–Ofelt intensity parameters, energy transfer microparameters and efficiency have been determined and discussed. It is found that present Er 3+/Tm 3+ doped fluoride glass possesses large calculated emission cross section (8.98×10 –21 cm 2) around 2.7 μm. The more suitable pumping scheme for laser applications at 2.7 μm laser is 980 nm excitation for Er 3+/Tm 3+ doped fluoride glass.