Third-Generation Femtosecond Technology (IMAGE) Optica Caption This image depicts a thin-disk ytterbium-doped YAG regenerative amplifier pumped by continuous-wave laser diodes. From paper: "Third-generation femtosecond technology," Optica 1, 45-64 (2014). Credit Hannieh Fattahi, Max-Planck Institut für Quantenoptik. 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.