Gain dynamics in a soft-X-ray laser amplifier perturbed by a strong injected X-ray field

Abstract : Seeding soft-X-ray plasma amplifiers with high harmonics has been demonstrated to generate high-brightness soft-X-ray laser pulses with full spatial and temporal coherence. The interaction between the injected coherent field and the swept-gain medium has been modelled. However, no experiment has been conducted to probe the gain dynamics when perturbed by a strong external seed field. Here, we report the first X-ray pump–X-ray probe measurement of the nonlinear response of a plasma amplifier perturbed by a strong soft-X-ray ultra-short pulse. We injected a sequence of two time-delayed high-harmonic pulses (λ = 18.9 nm) into a collisionally excited nickel-like molybdenum plasma to measure with femtosecond resolution the gain depletion induced by the saturated amplification of the high-harmonic pump and its subsequent recovery. The measured fast gain recovery in 1.5–1.75 ps confirms the possibility to generate ultra-intense, fully phase-coherent soft-X-ray lasers by chirped pulse amplification in plasma amplifiers.
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Article dans une revue
Nature Photonics, Nature Publishing Group, 2014, 8, pp.381-384. 〈10.1038/nphoton.2014.79〉
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https://hal-ensta.archives-ouvertes.fr/hal-01199046
Contributeur : Philippe Zeitoun <>
Soumis le : lundi 14 septembre 2015 - 18:34:31
Dernière modification le : jeudi 10 mai 2018 - 01:58:09

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Y Wang, S. Wang, L Li, Eduardo Oliva, M Berrill, et al.. Gain dynamics in a soft-X-ray laser amplifier perturbed by a strong injected X-ray field. Nature Photonics, Nature Publishing Group, 2014, 8, pp.381-384. 〈10.1038/nphoton.2014.79〉. 〈hal-01199046〉

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