LAUSR

Abstract The TeO2-WO3-GeO2-NdF3 (TWGNd) glasses containing various amounts of NdF3 were synthesized through melt-quenching method and analyzed for 1.06 μm fiber lasers. The index of refraction increases with the addition of NdF3 content at 5893 A wavelength. Different spectroscopic and radiative parameters were determined applying the standard Judd-Ofelt theory. The TWGNd glasses exhibit three emission transitions peaked at ∼0.90, ∼1.06 and ∼1.33 μm corresponding to 4F3/2 → 4I9/2, 4I11/2, 4I13/2 transitions, respectively at 808 and 514.5 nm laser excitations. A quenching in luminescence was noticed beyond 1.0 mol% of NdF3 content. The saturation intensities that were used to know the threshold power of input source for laser operation were determined. The observed results show that the TWGNd10 glass has the best choice to develop 1.06 μm fiber lasers.