White Upconversion in Yb~(3+)/Tm~(3+)/Ho~(3+) Co-Doped Antimony-Germanate Glasses

摘要

In the paper the spectroscopic properties of antimony-germanate glass co-doped with Yb~(3+)/Ho~(3+) has been investigated. Fabricated Yb~(3+)/Tm~(3+)/Ho~(3+) co-doped glass is characterised by the emission of simultaneous multicolour upconversion luminescence. Strong blue ~1G_4→~ 3H_6 (Tm~(3+)), green ~5F_4→~ 5I_8 (Ho~(3+)) and red ~5F_5 →~5I_8 (Ho~(3+)) upconversion emission bands have been measured under 976 nm excitation at room temperature. Influence of molar ratio of active ions and excitation power on the colour coordinates (CIE-1931) have been investigated.