Greater than five-order-of-magnitude post-compression temporal contrast improvement with an ionization plasma grating

Matthew R. Edwards, Nicholas M. Fasano, Andreas M. Giakas, Michelle M. Wang, Jesse Griff-McMahon, Anatoli Morozov, Victor M. Perez-Ramirez,Nuno Lemos,Pierre Michel,Julia M. Mikhailova

arxiv(2024)

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摘要
High-intensity lasers require suppression of prepulses and other non-ideal temporal structure to avoid target disruption before the arrival of the main pulse. To address this, we demonstrate that ionization gratings act as a controllable optical switch for high-power light with a temporal contrast improvement of at least 3×10^5 and a switching time less than 500 fs. We also show that a grating system can run for hours at 10 Hz without degradation. The contrast improvement from an ionization grating compares favorably to that achievable with plasma mirrors.
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