Patent ID: 8054519

Claim:
A wavelength-multiplex and space-multiplex holographic storage device comprising; a storage medium; a plurality of signal light beams respectively having different wavelengths and illuminating said storage medium; at least one reference light beam illuminating said storage medium and interfering with said signal light beams to form a set of interference patterns, wherein said interference patterns are respectively stored on different-depth storage layers of said storage medium; a laser source assembly emitting a plurality of multi-longitudinal-mode laser beams; a nonlinear optical waveguide array comprising a plurality of optical waveguides, receiving said multi-longitudinal-mode laser beams and generating a plurality of spectrum-narrowed light beams respectively have different wavelengths; a splitter splitting said spectrum-narrowed light beams into said signal light beams and a plurality of base light beams; a plurality of spatial light modulators each bearing two-dimensional type information needed by holographic recording, receiving one of said signal light beams, and adding said two-dimensional information to one of said signal light beams; a plurality of lenses respectively receiving said signal light beams from said spatial light modulators and outputting said signal light beams to said storage medium; a coupling device coupling said base light beams into a single said reference light beam having different wavelengths; and a reflection device reflecting said reference light beam to said storage medium.