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Holographic Data Holographic Data StorageStorage

Capacity : 6 TerabyteCapacity : 6 Terabyte

Access Speed : 10 Gb/secAccess Speed : 10 Gb/sec

Writing speed: 300 Kb/secWriting speed: 300 Kb/sec

B.Prabhakar,08311A1207,IT-A.

Thanks to Taraka Vineeth Naidu for his support in preparing the slides.

Optical storage devices for storing Optical storage devices for storing data.data. CDs, DVDs and Blu-ray disks.CDs, DVDs and Blu-ray disks. Storage capacity: 600MB – 128GB.Storage capacity: 600MB – 128GB. Stores bits of data on the surface of the Stores bits of data on the surface of the

recording medium.recording medium.

IntroductionIntroduction

Storage technologies have to evolve, to Storage technologies have to evolve, to keep pace with increasing customer keep pace with increasing customer demand.demand. Holographic Data Storage(HDS).Holographic Data Storage(HDS).

Theoritical capacity, 1-6TB (terabyte ).Theoritical capacity, 1-6TB (terabyte ). Possibility of storing 10-100TB of data in a Possibility of storing 10-100TB of data in a

single disk.single disk.

IntroductionIntroduction

A three-dimensional image formed by the interference of light beams from a laser or other coherent light source.

 The image changes with respect to the position and orientation of the viewing system.

Divisibility property.

What is Hologram?What is Hologram?

Proposed in the year 1963. Research started in 1970s. Expected to store 1TB data in a sugar-crystal sized

storage medium.

HDS stores data beneath the surface, in the volume of HDS stores data beneath the surface, in the volume of the recording medium.the recording medium.

More data will be stored.More data will be stored. High data access speed.High data access speed.

Holographic data Holographic data storagestorage

Access

Time

Data Transfer

Rate

Storage

Capacity

Archival

lifetime

2.4 s 10 GB/s 400 Mbits/cm2 50 years

Currently, Inphase Technologies is working on HVD.

Components: Blue-green argon laserBlue-green argon laser Beam splitters to spilt the laser beamBeam splitters to spilt the laser beam Mirrors to direct the laser beamsMirrors to direct the laser beams LCD panel (spatial light modulator)LCD panel (spatial light modulator) Lenses to focus the laser beamsLenses to focus the laser beams Lithium-niobate crystal or photopolymerLithium-niobate crystal or photopolymer Charge-coupled device (CCD) cameraCharge-coupled device (CCD) cameraHolographic Versatile

Disc

spatial light modulator

Reading dataReading data

{{ {{DriveDrive20MB/s-160 Mb/s transfer rate.20MB/s-160 Mb/s transfer rate.

405nm Laser wavelength405nm Laser wavelength

MediaMedia1.5mm recording material1.5mm recording material

130 mm diameter disk 130 mm diameter disk

300GB capacity300GB capacity

50 year archive life50 year archive life

Tapestry 300rTapestry 300r

No suitable recording media existed.

SOLUTION:TTapestry, a high-performance, proprietary material with proven high-density storage capabilities, was invented by InPhase Technologies.

Challenges facedChallenges faced

Lasers were costly and unreliable.

SOLUTIONDVD recording technologies require the availability of high-quality, price-competitive lasers. InPhase Technologies takes advantage of available red and blue lasers which are used in other high-volume products.

Challenges facedChallenges faced

If too many pages are stored in one crystal, the strength of each hologram is diminished. 

Align all of the HVD components in a low-cost system.

Still existing Still existing challengeschallenges

Technology has no Technology has no LimitLimit

Protien-coated diskProtien-coated disk Principal: coating a normal DVD with a special light-Principal: coating a normal DVD with a special light-

sensitive protein made from a genetically altered sensitive protein made from a genetically altered microbe.microbe.

Storage: Storage: 50TB50TB Possibility: Possibility: 240TB240TB

Developed by Professor Developed by Professor Venkatesan Venkatesan Renugopalakrishnan, Renugopalakrishnan, formerly of Harvard Medical formerly of Harvard Medical School and Florida International University. School and Florida International University.

Conclusion Conclusion