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