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Enhanced high-order harmonic generation driven by a wavefront corrected high-energy laser

  • Author(s): Wang, Y
  • Guo, T
  • Li, J
  • Zhao, J
  • Yin, Y
  • Ren, X
  • Li, J
  • Wu, Y
  • Weidman, M
  • Chang, Z
  • Jager, MF
  • Kaplan, CJ
  • Geneaux, R
  • Ott, C
  • Neumark, DM
  • Leone, SR
  • et al.

We developed and implemented an experimental setup for the generation of high-energy high-order harmonics in argon gas for nonlinear experiments in the extreme ultraviolet (XUV) spectral range. High-order harmonics were generated by loosely focusing a high-energy laser pulse centered around 800 nm into a gas cell filled with argon in a phase-matching condition. The wavefront distortions of the driving pulse were corrected by a deformable mirror, and the XUV conversion efficiency was significantly improved due to the excellent beam profile at focus. A high-damage-threshold beam splitter was used to eliminate high-energy driving pulses co-propagating with high-order harmonics. The setup has a potential to provide intense ultrashort XUV pulses reaching the intensity levels required for nonlinear experiments in the XUV spectral range.

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