Fiber Link (IMAGE) Optica Caption Researchers connected three laboratories in a 100-kilometer region with an optical telecommunications fiber network stable enough to connect optical atomic clocks. Credit Tomoya Akatsuka, Nippon Telegraph and Telephone Corporation Usage Restrictions None 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.