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Title: Gain dynamics in a soft X-ray laser ampli er perturbed by a strong injected X-ray eld

Seeding soft X-ray plasma ampli ers 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 eld and the swept-gain medium has been modelled. However, no exper- iment has been conducted to probe the gain dynamics when perturbed by a strong external seed eld. Here, we report the rst X-ray pump X-ray probe measurement of the nonlinear response of a plasma ampli er perturbed by a strong soft X-ray ultra-short pulse. We injected a sequence of two time-delayed high-harmonic pulses (l518.9 nm) into a collisionally excited nickel-like molybdenum plasma to measure with femto-second resolution the gain depletion induced by the saturated ampli cation of the high-harmonic pump and its subsequent recovery. The measured fast gain recovery in 1.5 1.75 ps con rms the possibility to generate ultra-intense, fully phase-coherent soft X-ray lasers by chirped pulse ampli cation in plasma ampli ers.
 [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [1] ;  [1] ;  [1] ;  [4] ;  [2] ;  [5] ;  [2] ;  [6] ;  [1]
  1. Colorado State University, Fort Collins
  2. Laboratoire de Physique des Gaz et des Gaz et des Plasmas
  3. ORNL
  4. Laboratoire d’Optique Applique´e, ENSTA, CNRS, Ecole Polytechnique
  5. Lawrence Livermore National Laboratory (LLNL)
  6. École Polytechnique
Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nature Photonics; Journal Volume: 8; Journal Issue: 5
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE; Work for Others (WFO)
Country of Publication:
United States