The effect of hydrogen additive on population densities in the afterglow of barium vapour lasers

Richard P. Mildren*, Daniel J. W. Brown, Robert J. Carman, James A. Piper

*Corresponding author for this work

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The effects of hydrogen additive on the performance and detailed kinetics of a pulsed barium vapour laser operating with burst-mode excitation are reported. Time resolved density measurements of significant atomic and ionic barium states in pure neon buffer gas and in a NeH2 mixture show that the plasma relaxes between excitation pulses much more rapidly when hydrogen is present. The observed improvement in laser performance (65% increase in output pulse energy) under steady state (i.e. end of burst) conditions with hydrogen additive is directly attributable to improved pre-pulse conditions, resulting from cumulative effects of the enhanced plasma relaxation. The results and conclusions are relevant to other cyclic pulsed metal vapour lasers.

Original languageEnglish
Pages (from-to)112-120
Number of pages9
JournalOptics Communications
Volume120
Issue number1-2
DOIs
Publication statusPublished - 1 Oct 1995

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