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Optical absorption and fluorescence spectra of Eu 3+ ions in Al(NO 3) 3-SiO 2 sol-gel glass have been investigated using the Judd-Ofelt theory. JO intensity parameters (Ω Ω λ λ) and subsequent radiative properties for 5 D 0 → → 7 F 1,2,4,6 transitions are determined. The lifetime (τ τ r) of 5 D 0 state is computed and along with JO parameters are compared with their corresponding values in other glasses prepared by conventional technique. A structural analysis, using IR and XRD spectra and non-linear parametrization of the silica gel glass is carried out. The study reveals the glass to be a very good third order non-linear amorphous optical material.

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