Optical properties of Ho-doped alumino–germano-silica glass optical fiber

Energy transfer and 1.8μm emission in Tm3+/Yb3+ codoped lanthanum tungsten tellurite glasses

“…It is well known that 2 is the most sensitive to the covalent bonding [16], so we can reasonable deduce that the covalent degree of the present TWL glass is stronger than that of fluoride and fluorophosphate glasses. On the other hand, the˝4/˝6 determines the spectroscopy quality of the host materials [19]. Among the glasses listed in Table 2, fluorophosphate glass has the largest˝4/˝6, and the present TWL glass has a value comparable with Germanate and phosphate glasses.…”

Spectroscopic properties of Sm 3+ -doped lanthanum borogermanate glass

“…As Ω 2 is sensitive to the covalent bonding, it can be reasonably deduced that the covalent degree of the present LBG glass is higher than any simple glass matrix listed in Table 2. On the other hand, Ω 6 is related to the rigidity, and Ω 4 /Ω 6 determines the spectroscopic quality of material [27]. The present glass shows the highest Ω 4 /Ω 6 value, indicating the favorable performance as host for luminescence activators.…”

Investigation of 2.0μm emission in Tm3+ and Ho3+ co-doped oxyfluoride tellurite glass

“…So far, most of the researches in glass matrix focused on silicate-, fluoride-, fluorophosphate-, germanate-and telluridebased glasses [9][10][11][12][13]. The fluoride glass has been used as a Ho 3+ and Tm 3+ host because of its low phonon energy and high rareearth solubility [14].…”