高功率半导体泵浦固体激光器输出特性的研究

Output characteristic of diode-side-pumped high power YAG laser

通过实验详细测量了水温、工作电流对二极管激光器发射波长的影响;采用光线追踪法模拟计算出在不同泵浦参数下半导体泵浦光在Nd:YAG棒内的分布情况,得到了圆周上泵浦模块的个数,泵浦光发散角等因素对泵浦光分布均匀性的影响。采用直接泵浦方式,分别设计了二种不同功率水平的半导体泵浦的Nd:YAG固体激光器聚光腔,得到了170和800 W的输出功率,并对激光器的输出特性进行详细测量,最大光光转换效率达37%,电光转换效率约为16%。

The shift coefficients of the central wavelength of diode laser under different cooling water temperature and operating current were measured. The gain distrubution in the Nd： YAG rod was theoretically studied using ray tracing program. Without the help of collimating lens, two kinds of diode-side-pumped modules were designed with different output power levels of 170 W and 800 W. The maximum optical to optical conversion efficiency is 37%.