Long-lived CO2 lasers with distributed heterogeneous catalysis

P. G. Browne*, A. L S Smith

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


In a sealed CO2-N2-He system with a clean discharge tube the degree of dissociation of the CO2 is greater than 80% (with no hydrogen present) and laser action cannot be obtained. If platinum is distributed along the discharge tube walls as a discontinuous film it catalyses back-reactions reforming CO2. The degree of dissociation is then less than 40% and efficient laser action at 10·6 μm is obtained. Using such distributed heterogeneous catalysis a CO2-N2-He-Xe laser has operated for more than 3000 h. In this system both hydrogen and deuterium are undesirable additives because they decrease the excitation rate of the upper laser level.

Original languageEnglish
Article number304
Pages (from-to)2464-2470
Number of pages7
JournalJournal of Physics D: Applied Physics
Issue number18
Publication statusPublished - 1974
Externally publishedYes


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