A new method for holographic data storage in photopolymer films

Recently, photopolymer films have been developed that are inexpensive, easy to fix and have a relatively large dynamic range, making them good candidates for high density data storage. An example of this material is DuPont´s HRF-150-38 photopolymer film. The storage density achievable with these materials is limited due to their thickness of tens of microns. In this paper we present two results. First, a new holographic multiplexing method (peristrophic multiplexing) that significantly increases the storage density achievable in thin films is demonstrated. In addition, an exposure schedule that maximizes the utilization of available dynamic range of the photopolymer is derived