Holographic storage technology of holographic memory

With the development of technology, people need more and more information, and the storage requirements of a large amount of information are getting higher and higher, and the dispute over the standard of "next generation DVD" is becoming more and more fierce. Holographic storage technology will dwarf the "next generation DVD disc" with tens of GB capacity. Applying holographic technology to storage can save the information capacity of 1000GB(ITB) on the size of a cube of sugar. All these are very close to us, and the curtain of holographic storage era will be opened in 2006:

What is holography? Holography means "all information". It is different from ordinary camera photography. It uses a laser beam to irradiate an object and make it reflect to the bottom plate, and then uses another beam of light to pass through a plane mirror and also reflect to the bottom plate, which forms an "interference pattern" on the bottom plate. When the backplane is irradiated by a second laser beam with the same wavelength, a clear image will appear.

Higher capacity, faster speed and stronger reliability are always the goals that users strive for hard disks. Holographic storage technology ranks among the recent scientific and technological trends selected by Forbes magazine.

Holographic memory appeared.

At present, the single-chip capacity of the existing DVD is 8.5GB, while the storage capacity of the next-generation DVD can reach 50GB. The holographic storage technology, rated as one of the coolest technologies in the future by Forbes magazine, can theoretically reach more than 1000 GB of data. At present, holographic storage products have reached 300GB, which is six times the storage capacity of the so-called next-generation DVD. The research and development of holographic storage technology has been carried out for more than 40 years, but it has not really been realized. Recently, several companies in Japan and the United States announced that they would launch commercialized holographic storage products in 2006. Among them, Infineon Technology Company of the United States developed a holographic memory based on the traditional "double-beam interference method". The signal beam and the reference beam came from different directions and irradiated at the same position. Japan's Hitachi Wansheng Company announced that it will use this technology to develop a holographic memory with a capacity of 300GB, which will be put on the market in September this year. In addition, Optoware Company of Japan adopts collinear holographic technology, and its signal beam and reference beam come from the same direction. They have developed a holographic memory with a capacity of 200GB, which will be put on the market in the middle of this year.