Spectroscopic Properties of Yttrium-Aluminum-Borate Glasses Activated by Terbium and Cerium Ions

Resumo

The Judd–Ofelt parameters are calculated for Tb³⁺ ions in yttrium-aluminum-borate glasses coactivated by Tb³⁺ and Ce³⁺ (X1) and activated solely by Tb³⁺ (X2). The following parameters are obtained: Ω₂ = 5.45 × 10 ^–20, Ω₄ = 2.82 × 10 ^–20, Ω₆ = 3.76 × 10 ^–20 cm² for X1 and Ω₂ = 4.99 × 10 ^–20, Ω₄ = 2.18 × 10 ^–20, Ω₆ = 3.51 × 10 ^–20 cm² for X2. It is shown that these glasses hold promise as a basis for the development of converters of UV-radiation into the green-yellow region of the spectrum.