| 摘要 |
A light-amplifying glass comprising a matrix glass and, added thereto, 0.01 to 10 wt % of Er, characterized in that said matrix glass substantially compris es 20 to 80 % of Bi2O3, 0 to 74.8 % of B2O3, 0 to 79.99 % of SiO2, 0.01 to 10 % of CeO2, 0 to 50 % of Li2O, 0 to 50 % of TiO2, 0 to 50 % of ZrO2, 0 to 50 % of SnO2, 0 to 30 % of WO3, 0 to 30 % of TeO2, 0 to 30 % of Ga2O3, 0 to 10 % of Al2O3, all percentages being based on molar amounts, with the proviso that i t contains at least one of B2O3 and SiO2.
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