Spectral broadening and luminescence quenching of 1.53μm emission in Er3+-doped zinc tellurite glass

Visible, Up-conversion and NIR (~1.5μm) luminescence studies of Er3+ doped Zinc Alumino Bismuth Borate glasses

“…The stimulated emission cross-section and gain band width values of ZnAlBiBEr10 glass are comparable to the other reported glass hosts[24,47,[60][61][62][63][64].…”

Optical characterization, 1.5μm emission and IR-to-visible energy upconversion in Er3+-doped fluorotellurite glasses

“…This effect, which is in proportion with Er 3 + dopant concentration, has been carefully described by Ehrmann et al [38]. According to this hypothesis, with an increase in the erbium content, the effect of selfabsorption may affect the emitted fluorescence mainly around the peak, consequently the measured emission intensity around it will be lower than their intrinsic values and then one can observe a bandwidth broadening [37]. On the other hand, changes in the chemical bonding of the ligands surrounding the Er 3 + ion have been discarded since, as has been already mentioned, no appreciable changes have been observed in the absorption spectra as a function of erbium content.…”

“…Considering the high degree of overlap between the absorption and emission cross-sections, especially at 1.53 mm (see Fig. 5), both effects can be explained considering radiation trapping effects due to re-absorption (self-absorption) [37], in which a part of the photons emitted radiatively from the 4 I 13/2 level of one Er + ion is re-absorbed by a nearby Er 3 + ion, inducing the transition 4 I 15/2 -4 I 13/2 with a subsequently re-emission. This effect, which is in proportion with Er 3 + dopant concentration, has been carefully described by Ehrmann et al [38].…”

Efficient 1.54μm laser property in near- stoichiometric Er:LiNbO3 crystal

“…The absorption and emission cross-sections of 1.54 μm emission in Er (3):NSLN crystal are calculated by the following equations [33][34][35][36]:…”