A new kind of microcomb (IMAGE) Chalmers University of Technology Caption Researchers at Chalmers University of Technology, Sweden, present a microcomb on a chip - based on two microresonators instead of one. It is a coherent, tunable and reproducible device with up to ten times higher net conversion efficiency than the current state of the art. Credit Illustration: Yen Strandqvist /Chalmers Usage Restrictions For editorial use only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.