Optical Analysis of RE³⁺: Boro-Fluoro-Phosphate Glasses

Abstract

We report here on the preparation and optical characterization of certain rare earth (Nd3+,Tb3+,Pr3+ &Tm3+ each in 0.2 mol %) ions doped in two new series glasses in the following composition: Series A: 69.8 B2O3 – 10 P2O5 – 10(ZnO/CdO/TeO2) – 10 AlF3 Series B: 69.8 B2O3 – 10 P2O5 – 10(ZnO/CdO/TeO2) – 10 LiF By applying the Judd-Ofelt intensity parameters of Nd3+: BFP glasses, radiative properties of the emission transitions ( 4F3/2 ®4IJ=9/2, 11/2 &13/2 ) at 906, 1079 and 1349nm have been evaluated. By applying the Judd-Ofelt intensity parameters, radiative properties for Er3+ ions doped glasses, the NIR emission (4I13/2 4I15/2 ) at 1547nm , and also visible green emission (4S3/2 4I15/2 ) at 547nm have been evaluated. Measured absorption spectra of Pr3+: BFP glasses have shown eight absorption bands at 443, 469, 481, 589 , 1008, 1419, 1523 and 1930 nm which correspond to the transitions 3H4 ®3P2, 3P1, 3P0, 1D2, 1G4,3F4, 3F3 and 3F2 respectively. Absorption spectra of Tm3+: glasses have revealed five absorption bands at 466, 685, 790, 1206 and 1644 nm which corresponding to the transitions 3H6®1G4, 3F3, 3H4, 3H5 and 3F4 respectively. Pr3+: glasses, with an excitation at 442nm (3H4 ®3P2), a orange-red emission at 600 nm (1D2® 3H4) has been observed. In the case of Tm3+: glasses, upon excitation with 355nm (3H6®1D2), blue emissions at 452 nm (1D2®3F4) and at 476 nm (1G4®3H6) are observed. From the measured NIR emission spectra of Pr3+: BFP glasses, an NIR emission at 1354nm (1G4®3H5) and form Tm3+: glasses, an NIR emission (3F4®3H6) at 1809 nm are observed with an Ar+ laser (514.5 nm) as the excitation source.

Optical analysis of RE3+ (RE = Pr3+, Er3+ and Nd3+):cadmium lead boro tellurite glasses

“…From this spectrum, sharp absorption bands at 454, 488, 524, 655, 797, 977 and 1529 nm are observed and these are assigned to the electronic transitions 4 I 15 /2 → 4 F 9 /2 , 4 S 3 /2, ( 4 G 11 /2 , 2 H 11 /2 ), 4 F 5 /2 , 4 I 9 /2 , ( 4 F 9 /2 , 2 G 9 /2 ) and 4 G 11 /2, respectively. The band positions were assigned to the electronic transitions mentioned above based on our earlier reports . Figure shows the NIR emission spectra of (0.25, 0.5, 1.0 and 2.0 mol%) Er 3 + ‐doped glasses.…”