Optical setup (IMAGE) Optica Caption The new optical atomic clock based on direct frequency comb excitation, which is pictured in the lab, achieved the same performance as a traditional optical atomic clock with two lasers. Credit Jason Jones, University of Arizona Usage Restrictions None License Original 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.