Observation of spectral gain narrowing in a high-order harmonic seeded soft-x-ray amplifier - Archive ouverte HAL Access content directly
Journal Articles Physical Review A : Atomic, molecular, and optical physics Year : 2010

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

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F. Tissandier
Stéphane Sebban
Philippe Zeitoun
Guillaume Lambert
Jean-Philippe Goddet
C. Valentin
Antoine Rousse

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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Dates and versions

hal-00508797 , version 1 (05-08-2010)

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F. Tissandier, Stéphane Sebban, Maxime Ribière, Julien Gautier, Philippe Zeitoun, et al.. Observation of spectral gain narrowing in a high-order harmonic seeded soft-x-ray amplifier. Physical Review A : Atomic, molecular, and optical physics, 2010, 81 (6), pp.063833. ⟨10.1103/PhysRevA.81.063833⟩. ⟨hal-00508797⟩
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