Holographic Data Storeg pptPresentation Transcript
Future Technology Submitted to Miss. Swati Sharma
Three dimensional or “holographic” datastorage involves using the entire mediafor storage, not just a few layers like wecurrently use today.The process is accomplished by usingtwo laser beams, instead of one, towrite data to the disk.
1. The object is converted into binary code of 1’s and 0’s like we use today.2. Next, the 1’s and 0’s are converted into a matrix of light and dark squares.
3. Those light and dark squares are then electronically sent to a spatial light modulator (SLM).4. The laser beam then shines through the spatial light modulator (SLM).5. Pixels of the spatial light modulator filter (block or allow) the light thus encoding the data into the laser beam.
Many disk prototypeshave been looked at overthe years, however, theindustry standard hasnow accepted havingthe HVD disk include areflective layer in order tobe backward compatibleand to assist withtracking of the writebeam.
“Stop and Go” “On the Fly”Conventional Holography Collinear Holography
Recording ProcessReference Pattern Information Pattern SLM Media Lens
In today’s world, digital media is becoming more and more common and is requiring more storage to meet the new demands. More industries are now using digital storage than ever before.200 DVD’s can fit on one 1 TB holographic disk with a future capacity of 6 terabytes.
IBMs test platforms can store up to 390 bits per square micron (a micron is a millionth of a metre). DVDs, by contrast, have a storage density of about five bits per square micron. DVD DVD Blu-Ray Blu-Ray HVDNumber of Layers Single Dual Single Dual 200+/-Recording Capacity 4.7GB 9.4GB 25GB 50GB 3.9TBData Transfer Rate 11.08Mb/s 11.08Mb/s 36Mb/s 36Mb/s 1GB/s
It has been estimated that all the books in the U.S. Library of Congress, could be stored on six (6) HVDs.The pictures of every landmass on Earth (Google Earth for example) can be stored on two (2) HVDs.With MPEG4 ASP encoding, a HVD can hold between 4,600 to 11,900 hours of video, which is enough for non-stop playing for a year.
Holography allows a million bits of data to be written and read out in single flashes of light, enabling data transfer rates as high as a billion bits per second (fast enough to transfer a DVD movie in about 30 seconds).
HVD’s have an estimated archival life expectancy of at least 50 years or more compared to CD/DVD archival life of 2 to 5 years (even though published life expectancies are often cited as 10 to 25 years or longer for optical media, it depends on the storage conditions and quality of the disks).
Low cost materials needed to comeavailable which are just now happeningdue to other industries utilizing newtechnology.Development of needed components,in fields outside the storage industry,have brought the cost down making itfinancially viable to proceed.
The Economist, Holographic data storage, Jul 31, 2003, http://www.economist.com/node/1956881 General Electric Global Research IBM J.RES. DEVELOP VOL 44 MAY 2000 J.ASHLEY ETAL InPhase Technologies, Longmont, Colorado, http://www.inphase-technologies.com/ Wikipedia – Holographic Data Storage, http://en.wikipedia.org/wiki/Holographic_data_storage Bell Laboratories Physical Sciences Research, http://www.bell- labs.com/org/physicalsciences/projects/hdhds/1.html How Holographic Memory Will Work by Kevin Bosner. http://computer.howstuffworks.com/holographic-memory1.htm Optware Corporation of America, Longmont, Colorado, http://www.thic.org/pdf/Jul05/optware.mdeese.050719.pdf Technology Review, July 2010, http://www.technologyreview.com/blog/mimssbits/25418/