Energy exchange between coherent light beams with spatial phase distortions in an azopolymer film

The energy exchange between coherent light beams with wave-front distortions in a photosensitive azopolymer film is experimentally studied. By using an adaptive interferometer with an azopolymer film as an element for combining the wave fronts of light beams, the phase visualisation is performed by transforming the spatial phase distortions of one of the beams incident on a medium to the amplitude distortions of another beam at the output. The experimental results agree with the theoretical conclusion that the spatial phase modulation at the input to a polymer is transformed to the amplitude modulation at the output and vice versa.