Femtosecond soft x-ray lasing in dense collisionaly-pumped plasma

Adeline Kabacinski (1) , Fabien Tissandier (1) , Julien Gautier (1) , Jean-Philippe Goddet (1) , Igor Andriyash (1) , Philippe Zeitoun (1) , Stéphane Sebban (1) , Eduardo Oliva , Michaela Kozlová

1 LOA - Laboratoire d'optique appliquée

We report the first experimental measurement of a strong pulse shortening of a seeded plasma-based soft x-ray laser at high electron densities. As a consequence of the gain gating caused by subsequent collisional ionization, the duration drops from 1.4 ps to an unprecedented value of 520 fs RMS when the electron density increases from 4 to 7.6×1019cm-3. These measurements, performed with an original single-shot method, are in good agreement with results from 3D Maxwell-Bloch simulations. © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI

Domaines: Physique [physics]

Adeline Kabacinski, Fabien Tissandier, Julien Gautier, Jean-Philippe Goddet, Igor Andriyash, et al.. Femtosecond soft x-ray lasing in dense collisionaly-pumped plasma. Physical Review Research, 2022, 4 (3), pp.L032009. ⟨10.1103/PhysRevResearch.4.L032009⟩. ⟨hal-03782870⟩