Reference-less complex wavefields characterization with a high-resolution wavefront sensor

Wavefront sensing is a widely used non-interferometric, single-shot, and quantitative technique providing the spatial-phase of beam. The phase obtained by integrating measured wavefront gradient. Complex random wavefields intrinsically contain high density singular structures (optical vortices) associated with non-conservative gradients making this integration step especially delicate. Here, using high-resolution sensor, we demonstrate experimentally systematic approach for achieving complete reconstruction complex wavefronts. Based on Stokes' theorem, propose an image segmentation algorithm to provide accurate determination charge location optical vortices. This expected benefit several fields requiring media characterization.