Phase-matched generation of highly coherent radiation in water window region Academic Article uri icon


  • Highly coherent extreme ultraviolet radiation around the water window region (~4.4 nm) is generated in a semi-infinitive helium gas cell using infrared pulses of wavelength 1300 nm, energy 2.5 mJ, duration 40 fs, and repetition rate 1 kHz. The pressure-squared dependence of the intensity and the almost-perfect Gaussian profile and low divergence of the high harmonic source indicate a phase-matched generation process. The spatial coherence of the source is studied using Young's double-slit measurements.


  • Dao, Lap V
  • Hall, Chris
  • Vu, Hoang L
  • Dinh, Khoung B
  • Balaur, Eugenui
  • Hannaford, Peter
  • Smith, Trevor A

publication date

  • June 20, 2012

has subject area