A COHERENTLY-COUPLED MULTILAYER 3-D MEMORY BASED ON A VECTORIAL RECORDING MEDIUM

PHYSICAL OPTICS CORPORATION (POC) PROPOSES TO INVESTIGATE POLARIZATION HOLOGRAPHIC COMPOUND COHERENTLY COUPLED (PHC3) MEDIUM FOR 3-D OPTICAL MEMORY. THE PHC3 MEDIUM IS A THICK STRUCTURE CAPABLE OF RECORDING, BY POLARIZATION VECTOR PHOTOINDUCED BIREFRIGENCE, POLARIZATION SELECTIVE HOLOGRAMS WITH GOOD RECORDING QUALITIES, HIGH DIFFRACTION EFFICIENCY, AND HIGH SELECTIVITY. INCORPORATING PHC3 MEDIUM INTO A NOVEL MULTILAYER PAGEORIENTATED HOLOGRAPHIC MEMORY (MPOHM) ARCHITECTURE, POC IS PREPARED TO DEMONSTRATE THE FEASIBILITY OF A NEW 3-D OPTICAL MEMORY DEVICE. THE MPOHM CONCEPT IS THE FIRST TO SPATIALLY SEPARATE AND ACCESS HOLOGRAMS IN THREE DIMENSIONS. MEMORY LOCATIONS ARE ADDRESSED BY AN ACOUSTOOPTIC BEAM DEFLECTOR AND ELECTROOPTIC POLARIZATION SWITCHES. WITH AN ADDRESSING SPEED OF ONE MICROSECOND OR LESS, THE RANDOM ACCESS RATE APPROACHES AN IMPRESSIVE 1.0 X 10^15 BYTES/SECOND. INPHASE I, THE MEMORY MEDIUM PHC3 WILL BE OPTIMIZED AND DEMONSTRATED IN A MPOHM ARCHITECTURE. PHASE II WILL MAXIMIZE STORAGE CAPACITY AND ACCESS RATE OF THE MPOHM DEVICE.