Researchers have clocked light beams made of warped waves carrying 2.5 terabits of information the capability of more than 66 DVDs per second. The method relies on manipulating what is known as the orbital angular momentum of the waves. Angular momentum is a greasy thought while applied to light, but an analogy closer to home is the Earth itself. Current work suggests that the deception could greatly increase the data-carrying ability in Wi-Fi and optical fibers.
Orbital angular momentum has only recently come to the fore as a promising means to achieve the similar trick. Most recently in Italy Bo Thide from Swedish Institute of Space Physics and a team of colleagues established the principle via sending beams made up of two dissimilar OAM states crosswise a canal in Venice, an experiment they described in the New Journal of Physics. According to Alan Willner a number of robust tools would be wanted to manipulate OAM states and to generate and deliver beams made up of quite a few of them.
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