A new safranine T sensitized photopolymer for holographic recording

A new type of holographic recording material using safranine T sensitized photopolymer based on polyvinyl-alcohol was fabricated and studied. And the material was specially exposed to the Ar+ laser of 514.5nm wavelength. The results indicate that the material has high diffraction efficiency, sensitivity and refractive index modulation. The maximum diffraction efficiency is nearly 40%, the sensitivity is 7.22×10-4cm2/mJ and the refractive index modulation is 3.65×10-4. But the Bragg-mismatch caused by the exposure must be considered during recording. Holograms were recorded in the material, and the images can be reconstructed clearly. So the photopolymer material is suitable for high-density volume holographic storage.