HOLOGRAPHIC MEMORY - Different Technologies Articles
Introduction Although conventional storage methods adapt to the growing needs of computer systems, they are reaching their fundamental limits. Often improvements made to these storage methods decrease access times or reduce the size of stored ...
Introduction Holographic Versatile Disc (HVD) is an optical disc technology which would hold up to 3.9 terabytes (TB) of information. It employs a technique known as collinear holography, whereby two lasers one red and one gr ...
Properties of Holograms A hologram is a block or sheet of photosensitive material which records the diffraction of two light sources. To create a hologram, laser light is first split into two beams, a source beam and a reference beam. The sou ...
One of the problems standing on the way of development of holographic memory devices is a search of the appropriate material. The most of the investigations in the sphere of holography were carried out with usage of photoreactive materials (mainly the ...
The HVD System: Writing Data A simplified HVD system consists of the following main components: Blue or green laser (532-nm wavelength in the test system) Beam splitter/merger Mirrors Spati ...
In order for holographic technology to be applied to computer systems, it must store data in a form that a computer can recognize. In current computer systems, this form is binary. In the previous section, it was mentioned that the source beam is manip ...
