Harmonic Generation by an Intense Laser Pulse in Neutral and Ionized Gases

X. Liu, D. Umstadter, E. Esarey, A. Ting

Research output: Contribution to journalComment/debatepeer-review

63 Scopus citations


Reported are the results of a harmonic generation experiment in a simple gas (hydrogen) using 1-ps, 1-μm laser pulses with a range of intensities extending from below to far above the laser ionization saturation threshold. The scaling with intensity above saturation of the third harmonic generated by a single laser-pulse in a filled gas cell is observed to not fit with a simple model that takes into consideration volume ionization effects alone. In another experiment, a pump-probe type, an upper limit on the conversion efficiency of third harmonic generation in a preformed plasma is determined. It is found to be in agreement with the efficiency predicted by a relativistic harmonic generation theory.

Original languageEnglish (US)
Pages (from-to)90-94
Number of pages5
JournalIEEE Transactions on Plasma Science
Issue number1
StatePublished - Feb 1993
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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