Structural and Optical Properties of Er3+ Doped Sodium Phosphate Glasses System for Laser Medium Candidate

Erbium (Er3+) doped phosphate glasses with chemical formula x(70-x) P2O5 – 10 Bi2O3 -10 Na2O – 10 Gd2O3 : x Er2O3(x= = 0.05 ; 0.1 ; 0.5 ; 1.0 ; 3.0 mol%) were prepared by a melted-quenching process. Glass samples are cutted to the optimum shape and size: 15 x 10 x 4 mm3. Furthermore, glasseswere smoothed to obtain a flat surface and high transparency. The physical properties like density, molar volume, and refractive molar of the glasses have been investigated by using Archimedes principle.The absorption and emission spectra have been obtained by utilize UV-Vis-NIR spectrophotometer and PTI Thoriba Spectrofluorophotometer respectively. From the measurements could be known that an increase in the concentration of Erbium ions provides a linear relationship to density and the strength value of the glass material field. In the measurement of optical absorption there are six absorption bands which are around wavelengths 379, 488, 521, 652, 803, and 978 nm. Each in sequence corresponds to the energy level: 4G11/2, 4F7/2, 2H11/2, 4F9/2, 4I9/2, dan 4I11/2. From the calculation results, it is found that the most probabilities occur at the transition 978 nm or 4I15/2→4I11/2 on the measurements at a wavelength of 200 nm to 2500 nm so that the glass has the potential as a laser glass material.