Smallest integrated Kerr frequency comb generator

Optical frequency combs can enable ultrafast processes in physics, biology, and chemistry, as well as improve communication and navigation, medical testing, and security. Engineers have built a Kerr frequency comb generator that, for the first time, integrates the laser with the microresonator, significantly shrinking the system’s size and power requirements. They no longer need to connect separate devices using fiber — they can now integrate it all on compact and energy efficient photonic chips.