Optical properties investigation and multicolor behavior of neodymium (Nd³⁺)-doped oxyfluoride silicate glasses...

The aim of this research is to investigate novel compositions of oxyfluoride glasses doped with Neodymium (Nd³⁺) rare earth ions in the visible spectrum. This area has not been extensively studied in the existing literature, so it is vital to understand the favorable photoluminescence characteristics within this part of the electromagnetic spectrum. Therefore, we synthesized and characterized SiO₂-PbO-PbF₂ (SPF) doped with 1% neodymium (Nd³⁺) ions glasses. Spectroscopic analyses, based on Judd-Ofelt theory, were conducted on absorption spectra. These analyses enabled to determine absorption cross-sections, transition probabilities, and Judd-Ofelt intensity parameters Ω₂, Ω₄, and Ω₆ for the different transition. Additionally, we calculated various radiative properties, such as branching ratios, integrated cross-sections, radiative lifetimes, emission cross-section, optical gain, and the multicolor behavior (chromaticity coordinates, CIE diagram) under different excitation wavelengths. The results suggest promising prospects for using these oxyfluoride silicate glasses doped with Nd³⁺ as a fluorophore, potentially for lasing materials around 630-nm emission and in other photonic applications.