Abstract
An investigation was made of the emission spectrum of an electric ionlzation high-pressure CO2 laser. The four strongest vibration-rotational transitions were active in a resonator without a dispersive element. The intensities of the lines fluctuated strongly though the total output was relatively stable. Interferometric measurements of the spectral width of the P(20) lines of the 000–1000 band were carried out in a plane-parallel dispersive resonator with a diffraction grating. The width of this line increased with the gas pressure and with the excess of the pumping level over the threshold.
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