Transient absorption and its influence on energy extraction in a discharge-pumped F2 laser

M. Kakehata, Y. Ueno, K. Tamura, F. Kannari

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Small-signal transient absorption of a discharge-pumped F2 laser (157.6 nm) medium was measured by using a Raman-shifted F2 laser (168.6 nm). The small-signal total absorption was obtained for 6 atm laser media at an excitation rate of ∼26 MW/cm3, where a small-signal net gain was independently measured to ∼35%/cm, as the sum of a transient absorption of ∼2.5%/cm and a stationary absorption of ∼0.5%/cm. In spite of the relatively large gain-to-loss ratio a significantly low maximum laser intensity of ∼2 MW/cm2, which gives zero extraction efficiency in the F2 laser medium, measured in heavily saturated F2 laser amplification experiments, suggests that the energy extraction is limited by additional absorption.

Original languageEnglish
Pages (from-to)1304-1310
Number of pages7
JournalJournal of Applied Physics
Issue number3
Publication statusPublished - 1994 Dec 1


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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