Frequency selective optical data storage system

Details Frequency selective optical data storage system Frequency selective optical data storage system

G - Physics

11

B

352/57, 352/32.4

G11B 13/04 (2006.01) G11C 13/04 (2006.01)

Patent

CA 1112365

FREQUENCY SELECTIVE OPTICAL DATA STORAGE SYSTEM Abstract of the Invention An optical data storage system and method that utilizes the frequency dimension to increase the storage capacity significantly. The system includes a storage material, for example, in the form of a block, adapted to undergo a photo induced reaction upon exposure to light and which exhibits inhomogeneous absorption line broadening. Data bits are stored by selective photo induced reactions induced by a narrow band laser at specific frequencies within the broad inhomogeneous line. The lifetime of these photo induced data bits is of the order of years so as to provide a non- volatile storage system. In a preferred embodiment, a material is selected so that the photo induced reaction can be made reversible thereby permitting, when desired, the erasing of the data bits.

291680

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