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US 8,045,246 B2Granted
Method and apparatus for bulk erasure in a holographic storage system
AssigneeAccess Optical Networks, Inc.
InventorsGlenn A. Gladney, Marvin Hutt
Life of this patent
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Abstract
A method and system for bulk erasing in a holographic storage system is disclosed. The method may involve illuminating the entire volume storage region of a photorefractive crystal with a laser to achieve bulk erasure, or may involve selective erasure of a portion of a single written page. For bulk erasure of the entire photorefractive crystal the use of a separate laser or an incoherent light source is used.
Claims18
A holographic storage system with bulk erasing comprising:
- a photorefractive crystal for storing and retrieving a plurality of pages;
- a first laser for providing a reference beam and a data beam for storing the plurality of pages on the photorefractive crystal;
- and a second laser for bulk erasing the plurality of pages;
- wherein the second laser illuminates the photorefractive crystal at a range of divergence angles.
1 more element
A method of bulk erasure in a holographic storage system comprising:
- providing a first laser;
- a photorefractive crystal;
- and a second laser;
- storing a plurality of pages with the first laser on the photorefractive crystal;
- illuminating the photorefractive crystal with the second laser, wherein the illumination bulk erases the plurality of pages;
- and
- wherein the second laser illuminates the photorefractive crystal at a range of divergence angles.
4 more elements
A holographic storage system with bulk erasing comprising:
- a photorefractive crystal for storing and retrieving a plurality of pages;
- a first laser for providing a reference beam and a data beam for storing the plurality of pages on a photorefractive crystal;
- and
- a second laser for bulk erasing the plurality of pages a digital micro-minor device for reflecting the data beam;
- a Micro-Electro-Mechanical System angle generating optical assembly for angle-multiplexing the reference beam;
- a camera for reading out the plurality of pages;
- and
- wherein a plurality of pages on the photorefractive crystal are removed after operation of the second laser.
5 more elements
Dependencies are inferred from the claim text.