报告题目： Attosecond photonics over km-scale network
报告人：Dr. Ming Xin ，Research Laboratory of Electronics, MIT, Cambridge, MA, USA
Center for Free-Electron Laser Science, DESY, Hamburg, Germany
Abstract: To observe electronic dynamics in atoms, molecules and condensed matter taking place on an attosecond time scale, next-generation photon science facilities like X-ray freeelectron lasers and intense laser beamlines require system-wide attosecond-level synchronization of dozens of optical and microwave signals up to kilometer distances. Recently for the first time we realized a timing synchronization system that can meet the strict timing requirements of such large-scale facilities. In the talk, I will discuss some key enabling technologies including master-laser jitter characterization, local timing synchronization, new designs of attosecond-precision timing/phase detectors, and analyze fundamental noise contributions in nonlinear pulse propagation in fiber links. With these techniques, a complete 4.7-km laser-microwave network with 950-attosecond timing jitter is achieved over tens of hours of continuous operation.
Ming Xin received his bachelor’s and doctor’s degree in electronic engineering from Tsinghua University, Beijing, China, in 2005 and 2010, respectively. In July 2011, he joined the CFEL Ultrafast Optics and X-rays Group of DESY in Hamburg, Germany, as a team leader. Since 2015, he has also been a scientist with the Research Laboratory of Electronics, MIT, Cambridge, USA. His research interests include optical communication, attosecond photonics, noise theory of mode-locked lasers, timing distribution systems and silicon photonics.