The oxyhalide rare earth doped laser glass of the present invention comprises the substitution of fluorine for oxygen in glasses having the general molar batch composition of 50% SiO.sub.2, 25% CaO, 25% Al.sub.2 O. sub.3 to improve the distribution of rare earth dopants in the glass. The general molar batch composition of the invention ranges from approximately 45-70% SiO.sub.2, 15-35% CaO, 10-25% Al.sub.2 O.sub.3, 4- 15% Al.sub.2 F.sub.6, and 0.001-2% Er.sub.2 O.sub.3. This substitution of fluorine into the 2SiO.sub.2. Al.sub.2 O.sub.3. CaO glass system provides erbium doped laser glasses having a Er.sub.2 O.sub. 3 batch content of 0. 01 mole % Er.sub.2 O.sub.3 to 1.2 mole % Er.sub.2 O. sub.3 (500 ppm Er. sub.2 O.sub.3 to 5.68 wt. % Er.sub.2 O.sub.3) which show little to no concentration quenching and exhibit useful fluorescence lifetimes of approximately 6 milliseconds (ms) or greater.
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机译：本发明的卤氧化物稀土掺杂的激光玻璃包括用氟代替氟，该玻璃的摩尔总组成为50％SiO 2，25％CaO，25％Al 2 O 3。 3改善稀土掺杂剂在玻璃中的分布。本发明的总的摩尔批料组合物的范围为约45-70％的SiO 2，15-35％的CaO，10-25％的Al 2 O 3，4-15％的Al 2 O 3。 2 F.sub.6和0.001-2％Er.sub.2 O.sub.3。氟代入2SiO.sub.2中。 Al.sub.2 O.sub.3。 CaO玻璃系统提供具有Er 2 O 2的掺do激光玻璃。 3批含量为0. 01摩尔％Er2 O3-1.2摩尔％Er2 O3（500 ppm Er.2 O3-5.68 wt。 ％Er.sub.2 O.sub.3）几乎没有或没有浓度猝灭，并显示出约6毫秒（ms）或更长的有用荧光寿命。
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