Abstract
The highest diffraction efficiency(DE) value after illuminations and post-curing of photopolymer films were obtained at the SeO2 /acrylamide(AA) Ratios of AA 3.0g, SeO2 1.0 g and the DE's were stable values of over 90%. By the addition of SeO2, the maximum DE at the initial stage of illumination reached at 300 seconds, which suggests SeO2 slow down the photopolymerization of DE variation curve for the optimum composition during extended-time illumination of 9,000 seconds resembles sin curve due to the combination of the monomer diffusion and the photopolymerization, and the photopolymer film expanded at about 8% after photopolymerization due to monomer migration.
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