利用端抽运板条放大器多角度通光的特点，建立了一套板条放大器各特性参数的测试系统，实现了动态加载条件下板条放大器的可提取功率、波前畸变及退偏度等多参数的同步测试。该系统包含千瓦级的窄线宽注入光源及提取功率测试系统，高精度热致波前畸变及退偏测试系统。当注入光源功率为2.7 kW，抽运电流为90 A 时，板条放大器中可提取功率约为2.9 kW，波前畸变幅值差值小于1 μm(27 mm 口径)，热致退偏约为5.1%。对比无注入光时测得的放大器相关特性参数，两者差异较大，说明了该测试系统对于准确掌握板条放大器性能的必要性。

Taking advantage of multi-angles light paths in end-pumped slab amplifier, a measurement system of characteristic factors of end-pumped slab amplifier is established, which can accurately detect the extracted power, wavefront distortion and depolarization at the same time. This system contains a kilo watt level and narrow linewidth seed source, highly accurate detectors of thermal induced wavefront distortions and depolarization. When the seed source is 2.7 kW and the pump current is 90 A, the extracted power from the slab amplifier is about 2.9 kW, the wavefront distortions is less than 1 μm (aperture of 27 mm), and the depolarization is about 5.1%. Compared with the factors under the non- extraction, the differences between them are distinct, which proves that the detecting system is essential to accurately acquire the qualities of slab amplifiers.