以掺铒磷酸盐玻璃中铒离子寿命随OH含量变化为依据，系统研究了碱土金属离子类型和含量对磷酸盐铒玻璃除水性质的影响。结果表明，采用通干燥O2和CCl4除水工艺可有效降低玻璃中OH含量，除水效果在通气的最初阶段最为明显，玻璃中OH含量降低速率随通气时间延长而减慢，最终趋于动态平衡。值得指出的是，在相同通气时间，磷酸盐铒玻璃的荧光寿命随碱土金属离子半径增大而减短。含有较高浓度碱土金属离子的磷酸盐铒玻璃具有较短的荧光寿命，并且在停止通气后熔体重新吸水的能力变大。

The effects of the type and concentration of alkaline-earth metal ions are systemically investigated on removing OH groups of erbium-doped phosphate glasses, by using fluoresent lifetime of erbium-doped phosphate glasses varying with OH concentration. The experimental results indicate that bubbling dry O2 and CCl4 gases into glasses could effectively reduce OH groups. The OH groups were removed rapidly at the beginning, then slowed down with increasing bubbling time, and finally, the removing and absorbing of OH groups of erbium-doped phosphate glasses reached equilibrium. It should be mentioned here that the fluorescence lifetimes at the same bubbling time decrease with increasing alkali-earth ions radius in the order of Ca>Sr>Ba. The erbium-doped phosphate glasses which have a high alkaline-earth metal ions concentration, exhibit a short fluorescence lifetime and a strong reabsorbing ability of OH- groups after stopping bubbling gas.