期刊
OPTICS EXPRESS
卷 22, 期 11, 页码 12869-12879出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.012869
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资金
- Italian Ministry of Education, Universities and Research (MIUR) [FIRB-RBAP06AWK3]
- European Research Council through the ERC [202804-TIMER]
X-ray free electron lasers (FEL) coupled with optical lasers have opened unprecedented opportunities for studying ultrafast dynamics in matter. The major challenge in pump-probe experiments using FEL and optical lasers is synchronizing the arrival time of the two pulses. Here we report a technique that benefits from the seeded-FEL scheme and uses the optical seed laser for nearly jitter-free pump-probe experiments. Timing jitter as small as 6 fs has been achieved and confirmed by measurements of FEL-induced transient reflectivity changes of Si3N4 using both collinear and non-collinear geometries. Planned improvements of the experimental set-up are expected to further reduce the timing jitter between the two pulses down to fs level. (C) 2014 Optical Society of America
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