back to article Sixteen shades of grey survive Viennese quantum optics test

Viennese researchers have taken another important step in the development of communications systems using optical angular momentum (OAM), a.k.a. “twisted light”, as the basis of the modulation. What's different in the latest work is that the group, from the University of Vienna and the Institute for Quantum Optics and Quantum …

  1. tony2heads

    grey?

    grey has nothing to do with it, but I suppose '16 distinct OAM states' doesn't sound cool.

    1. frank ly

      Re: grey?

      Did you watch the video? (turn the sound down). They scanned a greyscale image and encoded it as sixteen levels of grey to send across the optical link.

  2. Anonymous Coward
    Anonymous Coward

    Satellite

    Would this be usable for satellite transmission, using the "16 shades of grey" instead of the two "shade" V/H or RHCP/LHCP polarizations? That is, would the turbulence affect C/Ku/Ka band transmissions in the same way it affects light?

    Even if it could only use 4 shades of grey that would instantly double the potential bit rate per MHz. Pretty helpful if everyone hopes to be pushing 4K video around before long.

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