UV-vis absorption and luminescence spectrum of LAS: Tb^3+/Gd^3 as a laser material

This article discusses detailed study on crystallization, optical properties of Li-Al-Si-La glass containing nanocrystalline LaF3.and their optical energy gaps. The Urbach energy of glass samples was evaluated. By using (2% mole) Tb the green-blue range emission occurred, while by accumulation 1% mole Gd beside Tb, the indigo emission intensity (418 to 441 nm) increased.