Holographic memory: Great alternative of data storage

Our work strategies and mechanisms were gradually bestowed upon this digital machine which is largely expanded in the current scenario. Computer memory helps you to accomplish works in a very short span of time. The computer memory is classified into many sub divisions, among those sub divisions, holographic memory is an essential part of memory. Holographic memory is alternative data storage method of current magnetic and optical storage.

Holographic storage can be performed in the area of the recording medium where magnetic and optical storage is done only on the surface of the recording medium. Holographic memory features huge data storage capacity of 1 TB where present hard disk enables very few to this. In fact, this huge storage is possible due to the ability of holographic memory to process the recording throughout the whole area. It can store multiple images in the same place with different angels. There is one more distinct feature of holographic memory. Holographic memory is capable of storing millions of bits at a time where optical storage can do only single bit. Thus it can store huge data with a very high speed operation. Holographic memory uses an optical interference pattern to store data within it. The stored data is interpreted with the help of aggregation or reproduction of beams which was segregated firstly.

The first ever use of Hologram for data storage was first started in 1960, which was invented by Pieter Heerden. In 70s, scientists from TCRA Lab were able to store 500 holograms with lithium niborate-iron crystal. They also used light sensitive polymers to build some holograms. But this material cost was very high which was not rational to magnetic and optical devices, so that it became unpopular then. With advancement of laser technology, this storage method has again come into the light. In fact now in LCD and CCD devices this holographic technology is used commonly.

The ray of Argon is split into two by beam splitter. The signal then goes through the window mirror and crosses the light modulator. The signal is sent to the crystal via SLM (spatial light modulator). The reference beam introduces an interference pattern with some other methodology which is used to store information relayed by the primary beam. When light of exact wave length is used in the perfect position or area in the crystal, the stored data is revealed. The corresponding crystal use diffraction technique to regenerate the stored page which is sent to charge couple device (CCD). Then it becomes digital information and interpretable by the users.

Holographic memory will replace optical and magnetic data storage with its speed and storage capacity. In next few years, some video games and other sophisticated services may come into view with this technology. In fact holographic memory widens the opportunity to use more specified and high resolution data with more speed and comfort.

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