Patent ID: 7787165
Filing Date: 2010-08-31
Classification: G03H,G11C

Abstract:
1. A holographic memory system comprising: (a) a photorefractive crystal configured to store multibit holograms; (b) a single laser diode configured to emit a collimated laser beam to both write multibit data to and read the multibit data from the photorefractive crystal; (c) a multilevel spatial light modulator to encode the multibit data on an input beam split from the collimated laser beam, wherein: (d) a first imaging relay lens pair positioned between the multilevel spatial light modulator and the photorefractive crystal to image a multibit spatial light modulator image on a plane behind the photorefractive crystal and (e) one or more mirrors configured to steer a reference beam, split from the collimated laser beam, at high speed to the photorefractive crystal to read or write the multi-bit data.