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- W2020506473 abstract "Influence of CO 2 impurity within the laser medium on energy and spectral characteristics of the pulsed chemical chain DF-laser has been investigated experimentally. It is shown, that the mechanism of CO 2 influence on the output laser characteristics and their sensitivity to CO 2 concentration depends in a strong degree on lasing conditions. The influence of the CO 2 molecule is determined only by relaxation processes and the sensitivity is minimal when the transition only between the low vibrational levels radiate in wavelength range of 3.6 - 4.2 micrometer due to low resonator quality. With low CO 2 concentration and use of the high quality resonator the DF-laser generates on up to ten vibrational transitions in the wavelength range of 3.6 - 5.0 micrometer, thus the high efficiency of transformation of the reserved chemical energy in lasing is provided. In this case the CO 2 influence on the DF-laser characteristics is defined both the relaxation processes and to greater degree the CO 2 absorption in the range of 4.2 - 4.4 micrometer, and the sensitivity grows almost by the order of magnitude. On the basis of the investigations carried out the requirements to a degree of clearing of a laser medium from technological CO 2 impurity for achievement of high specific energies of HF- and DF-lasers are determined [(CO2) less than 0.4 and 0.005%, correspondingly]." @default.
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- W2020506473 date "1998-12-22" @default.
- W2020506473 modified "2023-09-23" @default.
- W2020506473 title "Effects of absorption and relaxation on CO 2 impurities in pulsed DF/HF lasers" @default.
- W2020506473 doi "https://doi.org/10.1117/12.334497" @default.
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