Patent ID: 8866107

Claim:
A method for measuring wavefront distortions of an optical beam directed inside a random scattering medium, the method comprising: partitioning transverse optical modes of the optical beam into a plurality of subsets of transverse optical modes; selecting one of the subsets of transverse optical modes as a current subset; modulating the optical beam based on the current subset by: maintaining the transverse optical modes of the optical beam that are outside the current subset stable; and modulating the transverse optical modes of the optical beam within the current subset; generating a non-linear optical signal from the modulated optical beam by directing the modulated optical beam through a non-linear optical system that includes the random scattering medium; measuring a power of the generated non-linear optical signal; and based on the measured power, extracting values of a spatial phase for the optical beam at transverse optical modes within the current subset, the values extracted being those that reduce the wavefront distortions in the optical beam.