Evolution of Optical Storage in Computer Memory
Computers have become increasingly important in our lives because they supply with unmatched access to an extensive load of information. This revolution has been made possible by decreasing the cost of storing data and increasing storage capacity for even smaller devices. Optical storage of data gives us higher memory capacity than the older magnetic storage because of the laser beams used that can control and focus much more precisely than the conventional tiny magnetic heads, thereby allowing the condensation of data into a much smaller space. For example, with focused beams of light, the surface storage density accessible is approximately 1/(2 Wavelength). But by storing information throughout the quantity at a density of 1/(3 Wavelength), the capability of a similar disk can be raised 2000 fold, to 8 Terabytes (TB).
KeywordsOptical storage Holographic storage 3D optical storage WORM disk
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