back to article NTT demos petabit transmission on single fibre

Japan’s NTT has announced an impressive speed/distance demonstration, achieving one petabit per second over a distance of 50 Km. The test, which was conducted in conjunction with Fujikura Limited, Hokkaido University, and the Technical University of Denmark, is described as a “new world record over a single strand,” surpassing …


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  1. another_vulture

    Not 12 Lasers.

    That is a "multi-core Fiber" (MCF.) It has 12 cores: effectively twelve spatially-separate optical channels, equivalent to 12 separate fibers in an (extremely) tight bundle. Each of thes cores supports a separate DWDM signal. Each of the many wavelengths within each of these twelve channels requires its own separate laser (or at least its own separate modulator.) The new innovation is the MCD with dramatically reduced cross-talk, and the optics that permit the 12 DWDM signals to be injected into the MCD and extracted from it. There appears to be no new innovation in the DWDM itself.

  2. Thorne
    Paris Hilton

    The possibilities for porn...

    1. Bob H

      As a colleague of mine once said about gigabit ethernet "I can't play with myself that fast."

  3. Herby

    "Peta" bytes?

    Is this approved by the "Peta" people (like People Eating Tasty Animals), they might object to their name being associated with bits and bytes!

    Sorry, I couldn't resist!

  4. Michael H.F. Wilkinson
    Thumb Up

    Cool, seriously cool!

    I visited their lab with two dozen students eleven years ago. They do a lot of seriously cool things there (like transistors that switch based on a single electron on the gate: talk about low power). The students were suitable impressed, even the guy who tried to do a limbo dance underneath a manipulator arm of a vacuum chamber set-up. Needless to say, our host was seriously relieved that I grabbed this student by the shoulder and gave him a very severe reprimand (think sergeant-major Shut-up Sahib).

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