Peristrophic multiplexing studies in silver doped photopolymer film

Abstract

The peristrophic multiplexing technique with rotation of the film in a plane normal to the bisector of the incident beams was employed for recording plane-wave transmission gratings at the same location of silver doped acrylamide photopolymer film. Both constant and variable exposure scheduling methods were adopted for storing gratings using a 632.8 nm HeNe laser. The diffraction efficiency (DE) and M number (M/#) obtained from both methods were compared to determine which method enabled the greatest number of gratings to be recorded with uniform diffraction efficiencies. By the variable exposure energy scheduling method, 30 nearly uniform plane wave gratings with M/# equal to 4.7, could be recorded in a 130 µm thick photopolymer layer.