Spectral Studies of Dy3+ Doped Heavy Metal Oxide Glasses

Abstract

Dy3+:PbO-Bi2O3-WO3-B2O3 glass systems have been developed using Melt quenching technique. Spectroscopic and
Physical properties of these glass systems have been investigated. The nephalauxetic effects for all the glass systems have
been computed. The physical properties such as density (d), molar volume (V), polaron radius (rp), refractive index (n),
inter ionic distance (ri) have been evaluated. The Judd-Ofelt theory has been applied to the analysis of absorption
spectra. The environment sensitive Ω2 parameter exhibits higher among the other Judd – Ofelt parameters indicate the
asymmetry around the rare earth ions in all the glass systems. The radiative lifetimes (τR)for certain lasing transitions
have been computed. Branching ratios (βr), absorption (σa) and emission cross sections (σe) for certain lasing transitions
have been reported. The visible luminescence spectra exhibit two intense bands around 480nm, 560nm due to 4F9/2-
→6H15/2(Blue) and 4F9/2→ 6H13/2 (Yellow) transition of Dy3+. Yellow to blue luminescence ratio (Y/B) for all the glass
systems indicate greater than unity.