Electronic spectra and optical band gap studies in neodymium chlorophosphate glasses

摘要: Abstract The present work aims to study the variation of optical band gaps, intensity parameters, and radiative lifetimes with different metal ions in various chlorophosphate glasses. Different glasses composition range 50P 2 O 5 +30Na HPO 4 +19.5RCl (R=Li, Na, K, Ca Pb) 0.5 mol% Nd 3 were prepared by quenching melts consisting above chemicals (1100–1200°C, 1.5–2 h) between two brass plates. Using absorption spectra, properties have been systematically studied. position edge hence, values gaps reported. Except for potassium, fundamental shifts longer wavelengths an increase average molecular weight glass. Judd–Ofelt analysis is used along a spectral calculate branching ratios. lifetime all states are high these when compared chloroborate There no relation spontaneous emission probabilities ion packing ratios phosphate as observed other glass systems. predicted transition ( A ), τ R β ) integrated cross-sections Σ certain excited 3+ doped also