Toward compact and ultra-intense laser-based soft x-ray lasers

Stéphane Sebban 1 Adrien Depresseux 1 Eduardo Oliva 1 Julien Gautier 1 F. Tissandier 1 J. Nejdl 2 M. Kozlova 2 G. Maynard 3 Jean-Philippe Goddet 1 Amar Tafzi 1 Agustin Lifschitz 1 H Kim S. Jacquemot 4 Pascal Rousseau 1 Philippe Zeitoun 1 Antoine Rousse 1
1 LOA - Laboratoire d'optique appliquée
2 ASCR - Czech Academy of Sciences [Prague]
3 LPGP - Laboratoire de Physique des Gaz et des Plasmas
4 DAM/DIF - DAM Île-de-France
Abstract : We report here recent work on an optical field ionized (OFI), high-order harmonic-seeded EUV laser. The amplifying medium is a plasma of nickel-like krypton obtained by OFI when focusing a 1 J, 30 fs, circularly-polarized, infrared pulse into a krypton-filled gas cell or krypton gas jet. The lasing transition is the 3d(9)4d (J = 0) -> 3d(9)4p (J = 1) transition of Ni-like krypton ions at 32.8 nm and is pumped by collisions with hot electrons. The gain dynamics was probed by seeding the amplifier with a high-order harmonic pulse at different delays. The gain duration monotonically decreased from 7 ps to an unprecedented shortness of 450 fs full width at half-maximum as the amplification peak rose from 150 to 1200 with an increase of the plasma density from 3 x 10(18) to 1.2 x 10(20) cm(-3). The integrated energy of the EUV laser pulse was also measured, and found to be around 2 mu J. It is to be noted that in the ASE mode, longer amplifiers were achieved (up to 2 cm), yielding EUV outputs up to 14 mu J.
Keywords : optical field ionized plasmas XUV lasers ultrafast laser coherent radiation
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Journal articles
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https://hal-ensta-paris.archives-ouvertes.fr//hal-01717597
Contributor : Pierre Zaparucha <>
Submitted on : Monday, February 26, 2018 - 3:17:54 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:03 AM

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Stéphane Sebban, Adrien Depresseux, Eduardo Oliva, Julien Gautier, F. Tissandier, et al.. Toward compact and ultra-intense laser-based soft x-ray lasers. Plasma Physics and Controlled Fusion, IOP Publishing, 2018, 60 (1), pp.014030. ⟨10.1088/1361-6587/aa8aaf⟩. ⟨hal-01717597⟩

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