Recall of linear combinations of stored data pages using phase code multiplexing in volume holography

Recently phase code multiplexed data storage in volume holographic media has been investigated as an alternative to angular or wavelength multiplexing. Phase code multiplexing allows implementation with fixed geometry and wavelength, resulting in potentially fast access times and the possibility of cascading in an optical system. In addition, it has been suggested that use of partial phase codes can be used to directly reconstruct certain sums and differences of stored images. We demonstrate the recall of arbitrary linear combinations of stored data pages by using a compound phase and amplitude modulator in the reference beam path