构建了一套氙灯抽运，大口径有源反射镜片状放大器实验装置。实验研究了布儒斯特角入射的有源反射镜钕玻璃放大器的增益特性。钕玻璃几何尺寸为890 mm×450 mm×50 mm，掺杂浓度为1.2%(质量分数)。最佳延时下，测得不同电压下的小信号增益系数和储能效率。充电电压为22 kV，氙灯放电脉宽为0.51 ms时，储能效率为1.94%，小信号增益系数为0.0371 cm-1。实验研究了横向放大自发辐射（ASE）和氙灯发光效率对增益特性的影响。

The structure of large aperture active mirror slab amplifier is presented, which is pumped by Xe-lamps. The application of active mirror in Nd: glass laser amplifier is explored. The size of Nd:glass is 890 mm×450 mm×50 mm . Doping density is 1.2% of mass fraction. The small signal gain coefficient and energy storage efficiency of different voltages are measured at the best delay time. The energy storage efficiency is 1.94% and the small signal gain coefficient is 0.0371 cm-1 when the charging voltage is 22 kV and the Xe-lamp′s discharging pulse width is 0.51 ms. Experiments are designed to research the effect of lateral amplified spontaneous emission (ASE) and luminous fefficiency of Xe-lamp on the small signal gain coefficient.