实验研究了Fe和Cu离子对N31型激光玻璃在激光波段1053 nm激光斜率效率的影响。研究发现，随着Fe离子含量的增加，激光斜率效率呈e指数快速下降，激光阈值呈二次方程形式快速增加，并得出Fe离子含量与斜率效率和激光阈值之间的经验关系式。同时发现，在相同掺杂浓度条件下， Cu离子比Fe离子更加严重地降低钕玻璃的激光性能。研究结果对如何提高激光玻璃的增益性能和定量控制原材料的杂质含量具有一定指导意义。
The effect of impurity such as Fe and Cu ions on the optical loss and laser performance of N31-type Nd-doped phosphate laser glass was studied. It was found that the laser slope efficiency decreased in accordance with an e exponential function, and the laser threshold increased in quadratic with the increase of Fe concentration. More-over, the empirical equations between concentration of Fe with laser slope efficiency and laser threshold were obtained. It also showed that laser efficiency was seriously influenced by Cu ion compared with that by Fe ion at the same con-centration. The results are useful for improving the gain performance of laser glass and quantitatively control of the impurity in raw materials in the future.
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