By Twisting Light Signals into a Vortex, Researchers Create Fastest Wireless Connection Ever
By twisting radio waves into a threaded vortex, an international team of researchers has beamed data through the air at 2.5 terabits per second, creating what has to be the fastest wireless network ever created. Moreover, the technique used to create this effect has no real theoretical ceiling, ExtremeTech reports. That means--in theory--that an infinite number of these vortex beams could be threaded together to add infinite capacity to conventional transmission protocols. These new, high-capacity vortex beams tap a characteristic known as orbital angular momentum (OAM). Right now, conventional transmission protocols like Wi-Fi or LTE modulate the spin angular momentum (SAM) but not the OAM. You can think of SAM as the spin of a signal, like a bullet (or a tightly spiraling football) twisting as it carves a direct path through the air. So to borrow ExtremeTech's analogy, if SAM is the earth rotating on its axis, then OAM is...