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Inicio  /  Applied Sciences  /  Vol: 10 Par: 21 (2020)  /  Artículo
ARTÍCULO
TITULO

Femtosecond Optical Laser System with Spatiotemporal Stabilization for Pump-Probe Experiments at SACLA

Tadashi Togashi    
Shigeki Owada    
Yuya Kubota    
Keiichi Sueda    
Tetsuo Katayama    
Hiromitsu Tomizawa    
Toshinori Yabuuchi    
Kensuke Tono and Makina Yabashi    

Resumen

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.

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