XUV Emissions from Terawatt Femtosecond Laser Produced Plasma Columns in Gases

  • Peixiang Lu
  • Hidetoshi Nakano
  • Tadashi Nishikawa
  • Naoshi Uesugi
Conference paper


Terawatt femtosecond laser pulses were focused into a gas cell to produce plasma columns in gases of N 2, O 2, and He. The axial xuv emission spectra that were generated are reported and analyzed. The xuv amplifications on transitions of NIII 3s(2 S) − 2p(2 P) at 45.2 nm and OIII 2p3s(3 P) − 2p 2(3 P) at 37.4 nm in low-charged nitrogen and oxygen ions were successfully demonstrated by a linearly-polarized 100-fs pump laser pulse of only 25 mJ. Strong axial xuv emission lines from a laser-produced plasma column in helium gas were also observed, however, no amplification was observed for the L α , line at 30.3 nm. High-order harmonics from a helium plasma column were also investigated with different pump energies under the defocusing condition for the laser beam.


Plasma Column Pump Energy Polarize Laser Pulse Pump Laser Intensity Chirp Pulse Amplification System 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Peixiang Lu
    • 1
  • Hidetoshi Nakano
    • 1
  • Tadashi Nishikawa
    • 1
  • Naoshi Uesugi
    • 1
  1. 1.NTT Basic Research LaboratoriesAtsugi, KanagawaJapan

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