Observation of spectral gain narrowing in a high-order harmonic seeded soft-x-ray amplifier
- Tissandier, F.
- Sebban, Stéphane
- Ribière, Maxime
- Gautier, Julien
- Zeitoun, Philippe
- Lambert, Guillaume
- Barszczak, Sardinha Anna
- Goddet, Jean-Philippe
- Burgy, Frédéric
- Lefrou, T.
- Valentin, C.
- Rousse, Antoine
- Guilbaud, O.
- Klisnick, Annie
- Nejdl, J.
- Mocek, T.
- Maynard, G.
DOIAbstract
International audienceWe 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
Add to ORKG