2.7 mu m band enhancement induced by energy transfer in Er3+/Tm3+ co-doped tellurite glass

摘要

In this work, the improvement of 2.7 mu mband mid-infrared fluorescence of Er3+ was investigated. When 0.6 mol% Tm2O3 was incorporated into the tellurite glass doped with 0.5 mol% Er2O3, the 2.7 mu mband fluorescence originating from the Er3+ : I-4(11/2) -> I-4(13)/(2) transition underwent significant enhancement up to 2.3 times under the excitation of an 808 nm laser diode. This enhancement was attributed to the energy transfers between Tm3+ and Er3+ ions. The energy transfer mechanism was investigated quantitatively by calculating the microparameters and phonon contributions. The obtained result indicated that Er3+/Tm3+ co-doped tellurite glass is a promising candidate applied for 2.7 mu mband optoelectronic devices. (C) 2021 Optical Society of America