Hello,

We noticed you're browsing in private or incognito mode.

To continue reading this article, please exit incognito mode or log in.

Not a subscriber? Subscribe now for unlimited access to online articles.

Intelligent Machines

Beyond Blu-Ray

Holographic storage on the cheap.

A conventional DVD stores data only on its surface. But holographic storage encodes data as three-­dimensional patterns embedded inside a disc, vastly expanding its storage capacity. A long-awaited holographic drive from InPhase of Longmont, CO, is due out late this year; geared to Hollywood studios and large archives, it will cost $18,000. But a few companies, such as General Electric and Sony, are working on holographic storage systems that could be more compatible with existing technologies.

Stackable storage: A hologram is produced by two beams of light that interfere with each other. In GE’s prototype data storage system, the beams enter a disc from opposite sides.

InPhase’s drive stores information in big blasts, 1.4 million bits at a time. That makes data retrieval extremely fast, but it also requires complicated and costly optics. A prototype system from GE, on the other hand, stores information a bit at a time–just like today’s media. That means that GE’s holographic discs could be played on modified Blu-ray players, which could potentially handle old DVDs and CDs, as well.

This story is part of our January/February 2009 Issue
See the rest of the issue
Subscribe

In the GE technology, the holographic bits–each measuring 0.3 by 5 micrometers–are arrayed in a plane, with dozens of planes layered throughout the disc. Initial versions of the disc will hold 300 gigabytes of data–about six times as much as a Blu-ray disc–and might reach market by 2012. Brian Lawrence, manager of GE’s Optical Polymer Lab, says that the technology should ultimately let a disc the size of a DVD store a terabyte of data. GE faces plenty of competition, however. Besides InPhase and Sony, other companies working on holographic storage include Daewoo and Maxell.

The experimental setup includes a beam splitter (cube at left) that bounces one of the beams off of a mirror (not shown) to ensure that it travels the same distance as the other beam before striking the disc.

Courtesy of General Electric

AI is here. Will you lead or follow? Countdown to EmTech Digital 2019 has begun.

Register now
More from Intelligent Machines

Artificial intelligence and robots are transforming how we work and live.

Want more award-winning journalism? Subscribe to Print + All Access Digital.
  • Print + All Access Digital {! insider.prices.print_digital !}*

    {! insider.display.menuOptionsLabel !}

    The best of MIT Technology Review in print and online, plus unlimited access to our online archive, an ad-free web experience, discounts to MIT Technology Review events, and The Download delivered to your email in-box each weekday.

    See details+

    12-month subscription

    Unlimited access to all our daily online news and feature stories

    6 bi-monthly issues of print + digital magazine

    10% discount to MIT Technology Review events

    Access to entire PDF magazine archive dating back to 1899

    Ad-free website experience

    The Download: newsletter delivered daily

/3
You've read of three free articles this month. for unlimited online access. You've read of three free articles this month. for unlimited online access. This is your last free article this month. for unlimited online access. You've read all your free articles this month. for unlimited online access. You've read of three free articles this month. for more, or for unlimited online access. for two more free articles, or for unlimited online access.