Free-Electron Laser (IMAGE) Helmholtz-Zentrum Dresden-Rossendorf Caption Two free-electron lasers at the HZDR deliver short and intense terahertz pulses. Credit HZDR/Bierstedt 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.