Analysis of the power spectral density of the laser wave front producing the wings and the performance of the focalspot

The property of the PSD (Power Spectral Density) distribution of the laser wavefront producing the focal spot with the wings is analyzed, whether the KPP, for controlling the shape and the intensity distribution of the focal spot, is put in or not. Based on the requirement of the focusing spot without the wings in the high power laser driver, the control demands of the aberrant wavefront of the incident laser beam is obtained．