Laser Radio Transmitter

Since the days of Hertz, radio transmitters have evolved from rudimentary circuits emitting around 50 MHz to modern ubiquitous Wi-Fi devices operating at gigahertz radio bands. As wireless data traffic continues to increase there is a need for new communication technologies capable of high-frequency operation for highspeed data transfer. Here the researchers have given a proof of concept of a new compact radio frequency transmitter based on a semiconductor laser frequency comb. The results will pave the way to new applications and functionality in optical frequency combs, such as wireless radio communication and wireless synchronization to a reference source.