Abstract
We constructed a synchronized femtosecond optical laser system with spatiotemporal stabilization for pump-probe experiments at SPring-8 Angstrom Compact Free Electron Laser (SACLA). Stabilization of output power and pointing has been achieved with a small fluctuation level of a few percent by controlling conditions of temperature and air-flow in the optical paths. A feedback system using a balanced optical-microwave phase detector (BOMPD) has been successfully realized to reduce jitter down to 50 fs. We demonstrated the temporal stability with a time-resolved X-ray diffraction measurement and observed the coherent phonon oscillation of the photo-excited Bi without the post-processing using the timing monitor.
Highlights
X-ray free-electron lasers (XFELs) [1,2,3,4,5,6,7] have significant impacts on a variety of scientific fields.In particular, coherent X-ray pulses with an ultrafast temporal duration (
High-power laser systems based on fiber lasers have been developed for user experiments [19,20,21,22] under high repetition rate operation of the megahertz order in the European XFEL [4] and the Linac Coherent Light Source II (LCLS-II) [3]
About 10% of the XFEL beam is split by a transmission grating and vertically focused on the gallium arsenide (GaAs) target in the timing monitor by an elliptical mirror [24]
Summary
Tadashi Togashi 1,2, * , Shigeki Owada 1,2 , Yuya Kubota 2 , Keiichi Sueda 2 , Tetsuo Katayama 1,2 , Hiromitsu Tomizawa 1,2 , Toshinori Yabuuchi 1,2 , Kensuke Tono 1,2 and Makina Yabashi 1,2.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
