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Holographic Data Storage

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Information about Holographic Data Storage
Science-Technology

Published on February 25, 2011

Author: Marcine

Source: authorstream.com

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Slide 1: By Marcine E. Lohman February 22, 2011 Future Technology What is Holographic Data Storage?: What is Holographic Data Storage? Three dimensional or “holographic” data storage involves using the entire media for storage, not just a few layers like we currently use today. The process is accomplished by using two laser beams, instead of one, to write data to the disk. CollinearTM vs. Two-Axis Holography: Collinear TM vs. Two-Axis Holography How Does Holographic Data Storage Work?: How Does Holographic Data Storage Work? How Does Holographic Data Storage Work?: The object is converted into binary code of 1’s and 0’s like we use today. Next, the 1’s and 0’s are converted into a matrix of light and dark squares. How Does Holographic Data Storage Work? How Does Holographic Data Storage Work?: How Does Holographic Data Storage Work? Those light and dark squares are then electronically sent to a spatial light modulator (SLM). The laser beam then shines through the spatial light modulator (SLM). P ixels of the spatial light modulator filter (block or allow) the light thus encoding the data into the laser beam. How Does Holographic Data Storage Work?: SLM Objective Lens Cover Layer Recording Layer Reflective Layer Inner: Information Outer: Reference How Does Holographic Data Storage Work ? Diffracted information beam (page data) Diffracted reference beam (modulated) Recorded Hologram How Does Holographic Data Storage Work?: How Does Holographic Data Storage Work? HVD Disk Structure: HVD Disk Structure HDV Recording Media: HDV Recording Media Many disk prototypes have been looked at over the years, however, the industry standard has now accepted having the HVD disk include a reflective layer in order to be backward compatible and to assist with tracking of the write beam. Writing Method: Writing Method Conventional Holography Collinear Holography “Stop and Go” “On the Fly” CollinearTM Holography: Collinear TM Holography Recording Process Media Lens SLM Information Pattern Reference Pattern Slide 13: Reconstruction Process Media Reconstructed SLM Beam Splitter Lens Reference Pattern Reflective Layer Collinear Holography Why the Interest in Holographic Data Storage?: Why the Interest in Holographic Data Storage? Increased storage capacity Increased read/write speed Longer storage life Security Increased Capacity: Increased Capacity 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. 2 00 DVD’s can fit on one 1 TB holographic disk w ith a f uture capacity of 6 terabytes. Increased Capacity: Increased Capacity IBM's 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 HVD Number of Layers Single Dual Single Dual 200+/- Recording Capacity 4.7GB 9.4GB 25GB 50GB 1TB Data Transfer Rate 11.08Mb/s 11.08Mb/s 36Mb/s 36Mb/s 1GB/s Interesting Facts: Interesting Facts It has been estimated that all the books in the U.S. Library of Congress, could be stored on six (6) HVD's . The pictures of every landmass on Earth (Google Earth for example) can be stored on two (2) HVD's . 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. Increased Speed: Increased Speed H olography 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 ). Why Is It So Fast?: Why Is It So Fast? Longer Storage Life: Longer Storage Life 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) . CollinearTM Holography Security: Collinear TM Holography Security HVD storage also offers interesting possibilities for data protection. For mass production, holographic media can be replicated very efficiently in one simultaneous transfer from a master. But once written, the replicated discs cannot be used as masters for further copying . By adjusting one of its laser beams, Collinear technology can provide a physical level of on-disk encryption during recording and reading, which holds great promise for digital rights management and other applications requiring high levels of security. CollinearTM Holography Security: Collinear TM Holography Security Focus and Track Servo: Focus and Track Servo Why is it taking so long?: Why is it taking so long? Low cost materials needed to come available which are just now happening due to other industries utilizing new technology. Development of needed components, in fields outside the storage industry, have brought the cost down making it financially viable to proceed. Why is it taking so long?: Why is it taking so long? Green lasers now used in the medical, cable TV, and printing industries are attractive recording sources due to their small size, ruggedness and low cost. Digital micro-mirror devices appearing in new types of displays are ideal spatial light modulators (SLM). This overhead projector for instance uses a SLM. Why is it taking so long?: Why is it taking so long? The CMOS active pixel detector arrays emerging in digital photography exhibit the rapid access and data transfer properties required for holography. CMOS sensors were originally proposed for the detection of visible light in cameras. In the holography field, they can detect the light patterns that are stored on the disks. HVD Pro Series 1000: HVD Pro Series 1000 Magnum Key Technological Partners: Key Technological Partners Sources:: Sources: The Economist, Holographic data storage, Jul 31, 2003, http:// www.economist.com/node/1956881 General Electric Global Research 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 / Questions?: Questions?

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