Holographic DVD to overtake DVD

Monday, May 19, 2008 |

In this new era DvD will become less popular. Holographic DVD which have memory capacity of 1.6 Terabytes will takeover the markets soon

Bell Labs spin-off InPhase Technologies and Hitachi Maxell are currently working on a computer disc about the size of a DVD that could hold up to sixty times the data. The companies hope to have the disc and compatible drives on the market by the end of next year.These discs will use holographic memory.

What is holographic memory?

Data is stored on a crystal material that is sensitive to light. In order to read and write data, a light beam is split in two and one is passed through semi-transparent material. This material alters the beam to encode data.

The two beams then merge again in the crystal and the pattern of interference of the altered beam is recorded. Information is read and written quickly, as a large number of bits can be recorded and retrieved in parallel with one another.

This will allow a single disc to hold up to 1.6 terabytes of data read at 160 megabits per second -- 340 times the capacity and 20 times the data rate of traditional DVDs, and more than twice the data rate of Blu-ray and HD DVD with more than fifteen times the space. Initially, however, holographic discs will launch with a capacity of 300GB.

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