2.7 μm fluorescence radiative dynamics and energy transfer between Er3+ and Tm3+ ions in fluoride glass under 800 nm and 980 nm excitation

A detailed study of the fluorescence radiative dynamics and energy transfer processes between Er and Tm ions in the Er3+/Tm3+ 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 Er3+/Tm3+ doped fluoride glass possesses large calculated emission cross section (8.98×10-21 cm2) around 2.7 μm. The more suitable pumping scheme for laser applications at 2.7 μm laser is 980 nm excitation for Er3+/Tm3+ doped fluoride glass.

► Er3+/Tm3+ doped fluoride glass with infrared emissions is reported. ► Radiative properties have been determined using Judd-Ofelt theory. ► Energy transfer is analyzed when pumped by conventional 808 nm and 980 nm LD. ► Present glass possesses high emission cross section and transition probability. ► Suitable pumping scheme for efficient 2.7 μm laser in prepared glass is found.