结合数字干涉技术和倍频技术, 设计了一种在相干控制中诊断相位波阵面畸变和判断其一致性的实验方案, 实现了对基频倍频光波前面相位畸变的诊断。制作了一套自动相位修正系统, 成功地应用于相干控制实验中。该系统利用相位畸变诊断算法, 根据光强与相位差的关系求出相位差的空间形貌,计算出驱动压电陶瓷伸缩的电压值, 使产生畸变的镜面朝相位畸变缩小的方向调整。实验结果表明, 该系统可实时地自动纠正基频光与倍频光光束波前面的相位差, 实现两相位面在全光孔径内保持一致。

Based on digital interference technology and second-harmonic generation (SHG) technology, a experimental method in diagnosing the phase aberration and phase coincidence on fundamental frequency and SHG laser wavefront is designed in coherent control. According to such technology, an effective auto-controlling system is designed and applied successfully in the coherent control photocurrent experiments. The method using retrieval algorithm, bases on the relationship between the beam intensity and phase difference to calculate spatial morphology in order to achieve the voltage of adjusting the piezoceramics, so that the mobile-mirror gets a movement with less aberration. The experimental results show that system can adjust the phase difference between the fundamental laser and its SHG automatically in real time, and realize the both wavefront being parallel in light aperture.