Abstract:The present investigation aims at elucidating the photoluminescence (PL) behaviour of Tb3+ doped SiO2–M2O3 (M=Al, Ga)–LiF–CaF2 optical glasses. The absorption spectra of these glasses have revealed the absorption bands due to 7F6 → (5L8, 5G3, 5L9, 5G4, 5D2, 5G5), 5L10, (5G6, 5D3) and 5D4 transitions. The Tb3+ excitation bands are assigned to the electronic transitions of 4f8 → 4f75d1 and 4f8 → 4f8. The PL spectra with the excitation wavelength 378 nm recorded at room temperature of these glasses have exhibited… Show more
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