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+ - Twisted light waves don't carry data->

dgharmon writes: "The new technique aims to exploit this orbital angular momentum, essentially encoding more data as a "twist" in the light waves .. In a paper in IEEE Transactions on Antennas and Propagation, Lund University's Ove Edfors and Anders Johansson argued that what was going on was a version of "multiple input, multiple output" — or Mimo — data transmission, a technique first outlined in the 1970s"
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Twisted light waves don't carry data

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