Research On The Performance Enhancement Of Red-sensitive Photopolymer Holographic Recording Material

Three-dimensional holographic storage technology has many particular advantages such as high storage capacity, high redundant and high data transfer rate, etc. It is one of the most potential next-generation great-capacity storage techniques, which are being developed in domestic and abroad laboratories. The key factor to realize high-density holographic storage is obtained ideal holographic storage material. Compared with current photorefractive crystal material, photopolymer holographic material has many advantages such as large spectral response range, high photosensitivity, high refractive-index modulation, high diffractive efficiency, easy to prepare large area film and comparatively simple manufacturing procedures, etc., and this material has become a research hotspot of holographic storage materials.Aiming at the problem of low spatial resolution of acrylamide/polyvinyl alcohol photopolymer material, we puts forward a new method to enhance the spatial resolution of the red-sensitive photopolymer. Through introducing low-molecular weight polyvinyl alcohol as binder, successfully increase the spatial resolution of the photosensitive system is successfully increased to over 3000 lines/mm, and 85% of diffractive efficiency is achieved in our experiment at the exposure level of 40mJ/cm~2.Based on above results, the recipe optimization of the concentration of chemical reagents such as methylene blue, polyvinyl alcohol, acrylic acid, and film thickness, etc., are conducted experimentally. The effects of above factors on the diffractive efficiency and photosensitivity, are also studied in detail.Morever, based on the red-sensitive acrylamide/polyvinyl alcohol photopolymer holographic recording material made in our laboratory, the researches on its holographic recording characteristics, its applications in spatial and angular multiplexing holographic storage and holographic interferometry, are performed in detail, the experimental results show that this photopolymer material has good application potential in the fields of holographic storage, holographic interferometry and holographic display.