High precision reconstruction of distorted wavefront in high power laser system

High precision wavefront reconstruction is very important for effective compensation, control and quality improvement of high power laser beam. The low and the middle and high frequency components of the distorted wavefront in the high power laser system can be described by use of RMS gradient and uniform random distribution respectively. First the intensity distributions on the input plane and other three faraway diffraction planes are used to iteratively reconstruct the low frequency component of the distorted wavefront in the high power laser system, and then the intensity distributions on the input plane and two near by diffraction planes are applied to iteratively reconstruct the middle and high frequency component. This algorithm shows good convergence when the reconstructed amplitud