Eu3+ and Gd3+ spectroscopy in fluoroindate glasses

Abstract

Luminescence data for Eu '+ and Gd'+ in fluoroindate glasses are compared to those of a fluorozirconate glass. Emission is observed from Eu3+ sD, (.I= 0, 1,2 and 3) and Gd3+ 6P ,,r excited-state levels and the results put in evidence Eu-Eu and Gd-Eu energy transfer processes. Vibronic bands related to a 320 cm-' vibrational mode could be observed for Eu3+ luminescent transitions with AJ=O, 1 and 2 and also for the 6P,~2+8S7~2 transition of Gd 3+. Lanthanide ion site symmetry is closer to an inversion center in fluoroindate &sses than it is in fluoroxirconate.

Spectroscopic properties and upconversion mechanisms inEr3+-doped fluoroindate glasses

“…3 The spectroscopy of Eu 3ϩ and Gd 3ϩ doped fluoroindate was studied showing evidence of Eu-Eu and Gd-Eu energy transfer. 4 Upconversion of fluoroindate glasses doped with Pr 3ϩ ͑Ref. 5͒ and Er 3ϩ ͑Ref.…”

Spectroscopic characterization of Ho3+ ion-doped fluoride glass

“…These compositions have lower multiphonon emission rates, and better chemical and atmospheric moisture stability [2][3][4][5]. Due to their low multiphonon emission rates (∼500 cm −1 ), rare earth-doped fluoride glasses have large upconversion efficiencies [6]. We have recently described sevin several host materials is described elsewhere [18].…”

Frequency upconversion inEr3+-doped fluoroindate glasses pumped at 1.48 μm

“…The vitreous region in the system InF 3 -ZnF 2 -͑SrF 2 -BaF 2 ͒ was established few years ago, 2 and it was later observed that the glasses can be stabilized by addition of GaF 3 , GdF 3 , CaF 2 , and NaF. 3 Previous works performed in this system include the study of their vibrational spectra and structure 4 and the spectroscopy of samples doped with Nd 3ϩ , 5 Pr 3ϩ , 5 Eu 3ϩ , 6 and Gd 3ϩ . 6 Our recent studies have shown that when doped with Er 3ϩ , Nd 3ϩ , and Pr 3ϩ , the fluoroindate glass presents large efficiency as upconverters from the infrared to visible 7 and from orange to blue and violet.…”

“…3 Previous works performed in this system include the study of their vibrational spectra and structure 4 and the spectroscopy of samples doped with Nd 3ϩ , 5 Pr 3ϩ , 5 Eu 3ϩ , 6 and Gd 3ϩ . 6 Our recent studies have shown that when doped with Er 3ϩ , Nd 3ϩ , and Pr 3ϩ , the fluoroindate glass presents large efficiency as upconverters from the infrared to visible 7 and from orange to blue and violet. 8,9 Erbium ions are appealing for spectroscopic investigation due to their energy level regular spacing which facilitates frequency upconversion via energy transfer or multistep pump absorption using a single excitation wavelength.…”