Abstract
Temporal behavior of small signal gain in pulsed CO laser amplifier operating with oxygen rich gas mixtures CO:He:O2 and CO:N2:O2 was experimentally studied. The rich content of oxygen in helium mixture (CO:He:O2 =1:4:2) resulted in ~8-fold increase of the maximum gain on low vibrational transitions (10→9) and strong absorption on high ones (21→20). A high efficient pulsed CO laser operating with gas mixture in which oxygen substituted for nitrogen was launched.
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