Wavefront measurement of laser beam traversing a supersonic flow with H-S wavefront sensor

The wavefront distribution and the dynamic wavefront change of laser beam traversing a supersonic flow could be measured with Hartmann-Shack wavefront sensor. The centroid shift and the far-field distribution of laser beam could be obtained by further analyzing and calculating the experimental data. The experimental principle of laser beam traversing a supersonic flow was given. Wavefront aberration under different flow conditions was obtained by adopting Zernike mode-construction theory. The PV and RMS curve, Zernike aberration coefficient, Strehl ratio and circle energy were presented. Experimental results show that the establishing process, the stablizing process and the ending process of the supersonic flow can be measured and analyzed with H-S wavefront sensor. Comparing the data of n