A novel photopolymer based on polyvinyl-alcohol for holographic storage was fabricated. The
material with riboflavin (RF), methylene bule (MB), erythrosin B (ErB) as the photosensitizers for
holographic storage has a broad absorption spectrum range (more than 500nm). The photopolymer
can be sensitized by the whole visible light, and that will improve storage capacity and density of the
holographic storage greatly, especially under the short wavelength recording. Photo-induced
reaction processes in the photopolymer and phase grating of index modulation for holographic
storage were studied. The surface structure of the grating and the images of reaction processes were
scanned by SEM (Scanning Electron Microscope). The experimental results are compared with the
kinetics theory of the polymerization and they are fitted well. Furthermore, the grating constant can
be estimated from grating images which were scanned by SEM. Some holographic characteristics of
the photopolymer were analyzed. Using a standard holographic setup, we recorded unslanted
diffraction gratings.The material has high maximum diffraction efficiency (≥68%), good sensitivity
(≥3.03×10-3 cm2/mJ), and high index modulation (≥4.58 ×10-4) when its tickness is about 300μm.
Two dimentional simulate images generated by SLM (Spatial Light Modulator) were stored in the
film, and the reconstructed data pages had good fidelity. The results show that the material has a
better potential in holographic storage.