Holographic Memory Discs

Welcome to Holographic Memory Discs. Holographic memory storage is just coming out of the research labs. It is a very high-capacity data storage technology versus our current storage friends – hard drives and DVDs. These current storage technologies rely on individual bits being stored as distinct magnetic or optical changes on the surface of the recording medium. Holographic memory cards overcome this limitation by recording information throughout the volume of the card.

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Holographic memory cards can also record multiple images in the same area utilizing light at different angles.

Additionally, whereas hard drives and dvds record information a bit at a time in a linear fashion, holographic storage is capable of recording and reading millions of bits in parallel. This enables data transfer rates much greater.

Not available yet, heres a picture of the optical Holographic Versatile Disc (HVD). It is projected to hold up to 6TB (terabytes) of information. It employs a technique known as collinear holography, whereby two green laser beams are collimated in a single beam. The green laser reads data encoded as laser interference fringes from a holographic layer near the top of the disc. With another reference beam, data can be read within the layer and can also provide data storage at various angles of the laser(s).

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Holographic Versatile Disc (HVD): 3.9 Tetrabyte-Disc, Necessary?