The device tested by the researchers uses a laser to extract and transmit microwave signals,
The laser, unlike the white noise generator,erupting the whole spectrum of sound, it generates it at one frequency - almost like a violin playing an exact note. In a frequency comb, a laser generates multiple beams at several frequencies that are evenly spaced like the teeth of the comb - this allows you to create a so-called infrared laser frequency comb.
For information transfer, researchersmodeled the comb by encoding the data in microwave radiation. The signal was then transmitted via an antenna to the receiving point, another antenna received it, and the computer filtered and decoded.
Previously, engineers at the Massachusetts Institute of Technology (MIT) presented a flexible device capable of converting Wi-Fi signals into electricity.