Abstract

It has been observed that significant increases (∼ 40%) in both the small-signal gain and laser efficiency occur when small, carefully controlled quantities of tripropylamine are added to the gas mixture of a TE CO 2 laser. The results obtained are compared with the predictions of a detailed molecular kinetics model and are shown to be consistent with the proposal that doping helps to maintain the discharge uniformity at high energy loadings. With the small TE laser employed, the use of tripropylamine has enabled laser energy densities of ∼ 47J 1 -1 atm -1 to be achieved at a discharge efficiency of ∼ 10%

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