Ultrafast Framing Imaging utilizing Multiple\n Optical-parametric-amplification with High Spatial Resolution and Imaging\n Rate

The discovery and understanding of many ultrafast dynamical processes are\noften invaluable. This paper is the first report to apply optical parametric\namplification to implement single-shot ultrafast imaging with high space and\ntime resolutions. Our setup breaks the constraints usually occurring among the\ntime resolution, frame number, frame interval and spatial resolution in\nexisting single-shot femtosecond imagers, so its performance can be greatly\nimproved by using laser pulses with higher power and shorter time durations.\nOur setup has provided the highest experimental record of the frame rate and\nspatial resolution with the temporal resolution of 50 fs simultaneously. It is\nvery powerful for accurate temporal and spatial observations of the ultrafast\ntransient events with a lifetime down to the femtosecond scale, such as atomic\nor molecular dynamics in photonic material, plasma physics, living cells, and\nneural activity.\n