1. Future Optical Computer Storage-Holographic Memory
... are made using a blue-green argon laser. The storage medium in this case is a photorefractive crystal, typically made from lithium-niobate. Just as before, the reference beam travels straight to the storage medium. The signal beam passes straight through a Spatial-Light Modulator (SLM). The SLM is a liquid crystal display that stores pages of binary data as light and dark pixels. The pages ... can be stored on a one centimeter sized crystal cube is potentially huge. This is because, when storing data, a slight change (about a thousandth of a degree) in the angle of the signal beam cause...
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- Grade Level: High School