Observation of spectral gain narrowing in a high-order harmonic seeded soft-x-ray amplifier

F. Tissandier, S. Sebban, M. Ribière, J. Gautier, Ph. Zeitoun, G. Lambert, A. Barszczak Sardinha, J.-Ph. Goddet, F. Burgy, T. Lefrou, C. Valentin, A. Rousse, O. Guilbaud, A. Klisnick, J. Nejdl, T. Mocek, and G. Maynard
Phys. Rev. A 81, 063833 – Published 29 June 2010

Abstract

We report an observation of spectral gain narrowing of a high-order harmonic amplified by a soft-x-ray optical-field-ionized plasma. The temporal coherence and spectral linewidth of both the seeded and unseeded soft-x-ray lasers were experimentally measured using a varying-path-difference interferometer. The results showed that the high-order harmonic is subject to a strong spectral narrowing during its propagation in the plasma amplifier without rebroadening at saturation. This is in good agreement with a radiative transfer calculation including gain narrowing and saturation rebroadening.

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  • Received 19 February 2010

DOI:https://doi.org/10.1103/PhysRevA.81.063833

©2010 American Physical Society

Authors & Affiliations

F. Tissandier*, S. Sebban, M. Ribière, J. Gautier, Ph. Zeitoun, G. Lambert, A. Barszczak Sardinha, J.-Ph. Goddet, F. Burgy, T. Lefrou, C. Valentin, and A. Rousse

  • Laboratoire d’Optique Appliquée, ENSTA Paristech/Ecole Polytechnique/CNRS UMR 7639, F-91761 Palaiseau Cedex, France

O. Guilbaud and A. Klisnick

  • Laboratoire d’Interaction du Rayonnement X Avec la Matière, Université Paris Sud/CNRS UMR 8624, F-91495 Orsay Cedex, France

J. Nejdl and T. Mocek

  • Department of X-ray Lasers, Institute of Physics, Na Slovance 2, CZ-182 21 Prague 8, Czech Republic

G. Maynard

  • Laboratoire de Physique des Gaz et des Plasmas, Université Paris Sud/CNRS UMR 8578, F-91405 Orsay Cedex, France

  • *fabien.tissandier@ensta.fr

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Issue

Vol. 81, Iss. 6 — June 2010

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