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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 k W,抽运电流为90 A时,板条放大器中可提取功率约为2.9 k W,波前畸变幅值差值小于1μm(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。
By using the characteristic of multi-angle light-emitting of end-pumping slat amplifier, a set of testing system of slab amplifier characteristic parameters was set up, and the extractable power, wavefront distortion and de-skewness of slat amplifier under dynamic load condition Multi-parameter synchronization test. The system includes a kilowatt-class narrow linewidth injection light source and extraction power test system, high-precision thermal wavefront distortion and depolarization test system. When the injection power is 2.7 k W and the pumping current is 90 A, the power draw in the slatted amplifier is about 2.9 kW and the amplitude difference of wavefront distortion is less than 1μm (27 mm diameter). The thermal induced depolarization Is 5.1%. Comparing the amplifier-related characteristic parameters measured without injection light, the difference between the two is large, indicating the necessity of the test system to accurately grasp the performance of the slat amplifier.