Broadband near-infrared emission from Bi-doped aluminosilicate glasses

摘要

Bi-doped sodium-potassium aluminosilicate glasses were synthesized and characterized. Broadband near-infrared (IR) emission covered the whole telecommunication wavelength region, with a maximum peak at about 1250 nm, a full width at half-maximum of about 370 nm, and a lifetime longer than 420 μs. The present glasses are potential materials for tunable lasers and optical amplifiers. The decrease of active Bi center concentration with the increase of Na_2O content and the addition of CeO_2 are first reported here, and the IR emission center in sodium-potassium aluminosilicate glasses might be ascribed to low-valence-state bismuth, most probably, Bi~+.