NIR and upconversion luminescence properties of Nd3+doped in Gd2O3-CaO-SiO2-B2O3 glass system

Abstract

In this work, properties of Nd3+in Gd2O3-CaO-SiO2-B2O3glass systems with composition 25Gd2O3-10CaO-10SiO2-(55-x)B2O3-xNd2O3where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol% were investigated. The optical absorption spectra show peaks at4F3/2(877 nm),4F5/2+2H9/2(802 nm),4F7/2+4S3/2(743 nm),4F9/2(682 nm),2H11/2(627 nm),2G7/2+4G5/2(582 nm),4G7/2+2K13/2(527 nm),4G11/2(481 nm),2P1/2(427 nm) and2L15/2+4D1/2+1I11/2+4D5/2+4D3/2(355 nm) reflecting the Nd3+ions in glass matrices. The densities were increased with increasing of Nd2O3concentration. This indicates the increase of the molecular weight by the replacement of B2O3with a heavier Nd2O3oxide in the glass. The upconversion luminescence spectra show bands at 393 nm for all Nd2O3concentration and the strongest intensity from 2.5% mol of Nd2O3was obtained. For NIR luminescence, the intensity of Nd3+emission spectra increases with increasing concentrations of Nd3+up to 1.5 mol% and beyond 1.5 mol% the concentration quenching is observed. © (2014) Trans Tech Publications, Switzerland.