Laser Radio Transmitter

Researchers have demonstrated a laser that can emit microwaves wirelessly, modulate them, and receive external radio frequency signals, enabling it to function as a laser radio transmitter. Previously, the researchers discovered that an infrared frequency comb in a quantum cascade laser could be used to generate terahertz frequencies, the sub-millimeter wavelengths of the electromagnetic spectrum that could move data hundreds of times faster than today’s wireless. It was also found that quantum cascade laser frequency combs could act as integrated transmitters or receivers to efficiently encode information.