May 28th, 2007 by ketyung
We’ve just learned about the great storage size of Holographic storage technology. It’s good to catch up now that some great work and other approaches by other manufacturers. Sony has recently announced that they’ve done some great work for their holographic technology.
The improvements by Sony are, adding layers to their disc to increase storage size and also the improvement on transfer rate. For the storage size, Sony managed to bump it up by improving its single-layer Micro-Reflector recording technique to support a full four-layers. It says that Sony has made use of standard blue-violet semiconductor laser diode to write on the 250 ¼m-thick photopolymer recording layer, with nothing more than a few optical parts added to change the focal point depth in order to write on multiple layers. But there is still work to be done for the improvement, as having the 4 layers is facing some little problem, which the laser will get weaken significantly as well as its transfer rate, while it’s reached the 4th layer. Well, Sony is pretty confident to overcome this problem. Sony’s approach is aiming one day, they could produce a 500GB disc made up of twenty layers packing 25GB a piece.
On the other hand, they have also improved a lot for the data transfer rate on their Holographic technology. Sony’s managed to increase the transfer rate of its “coaxial type” holographic data storage system from a mere 3 Mbps to 92 Mbps and 107 Mbps for read and write times, respectively. The improvement was achieved by its new image-stabilization system and also an improved CMOS sensor that gives higher frame frequency. And Sony is aiming to give a great transfer rate of 1Gbps by boosting the laser output and increasing the sensitivity of the recording medium.
via [engadget]
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June 2nd, 2007 at 5:15 am
[...] There are more players now competing to give us better storage technology and medium. After knowing the aggressiveness of Sony and InPhase in the development holographic storage. Here comes another one, the researchers at Nanyang Technological University in Singapore. These reseachers have found a better way, which their kind of rewritable holographic storage medium can be used for storing data and also for manipulating cells and other tiny particles. This holographic system is unlike others, which uses only a single laser that relies on software to calculate the necessary pattern, which simplifies recording. In such a case, the data can be temporarily erased by simply applying a voltage to it and makes it more flexible to be used in various electronic devices. It’s good to have this kind of competition among manufacturers and researchers, so we’ll get better and cheaper technology. [...]