Enhancement of short-pulse recombination-pumped gain by soft-x-ray photoionization of the ground state

J. P. Apruzese, D. Umstadter

Research output: Contribution to journalArticle


The gain achieved in lasing to the ground state following short-pulse field ionization by a pump laser is highly transient. It will usually persist for only tens of picoseconds because of the rapid filling and negligible emptying of the ground state. Employing a detailed atomic model of lasing in hydrogen, we show that the removal of ground-state population by an appropriate broadband ionizing radiation field can enhance and prolong the gain in such a laser.

Original languageEnglish (US)
Pages (from-to)443-446
Number of pages4
JournalJournal of the Optical Society of America B: Optical Physics
Issue number2
Publication statusPublished - Feb 1996


ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

Cite this