Ultrafast Framing Imaging utilizing Multiple Optical-parametric-amplification with High Spatial Resolution and Imaging Rate
The discovery and understanding of many ultrafast dynamical processes are often invaluable. This paper is the first report to apply optical parametric amplification to implement single-shot ultrafast imaging with high space and time resolutions. Our setup breaks the constraints usually occurring among the time resolution, frame number, frame interval and spatial resolution in existing single-shot femtosecond imagers, so its performance can be greatly improved by using laser pulses with higher power and shorter time durations. Our setup has provided the highest experimental record of the frame rate and spatial resolution with the temporal resolution of 50 fs simultaneously. It is very powerful for accurate temporal and spatial observations of the ultrafast transient events with a lifetime down to the femtosecond scale, such as atomic or molecular dynamics in photonic material, plasma physics, living cells, and neural activity.