Preparation and optical properties of HoF3–BaF2–AlF3–GeO2 glasses

Spectroscopic investigation of 2.0 µm emission in Ho3+-doped fluoroindate glasses

“…Additionally, these observations corroborate previous works, which report that small compositional changes result in small variations in the λ parameters values, usually within the experimental errors [14]. Some works have pointed out that JO parameters are related to physical-chemical properties such as viscosity and covalent character of the chemical bonds [15][16][17][18][19][20][21][22][23][24][25][26][27]. For instance, large values of the 2 parameter are indicators of the covalent character of the chemical bonds among glass matrix and rare earth ions.…”

Effect of optical basicity on Er3+ up-conversion luminescence in GeO2–R2O glasses

“…Ω t are the J-O intensity parameters, f N J are the wave function of the states with N electrons in 4f shell having total angular momentum J. In these J-O intensity parameters [16], it is generally accepted that Ω 2 is related with the asymmetry of the Er 3+ ion sites along with the covalency between rare earth ions and ligand ions, while Ω 4 and Ω 6 parameters represent the rigidity of medium in which the ions are located, Table 1 lists the value of Ω 2 , Ω 4 , and Ω 6 for the three glasses. As shown in Table 1, the Ω 2 parameter remains almost constant with the increasing in radius of alkali ion, while Ω 6 decrease with the increasing of radius of alkali ion.…”

Fluorescence enhancement of oxide fluoride glass co-doped with TbF3 and SmF3

“…Nevertheless, control of this fluorescence peak pattern is very interesting for application to optical devices. Oxide fluoride glasses, which can contain rare earth fluorides of more than 50 mol%, have been studied and investigated for their preparation and properties [23,24]. We have also reported the orange emission of Tb 3+ containing oxide fluoride glass [25].…”