Spectral coincidences between emission lines of the CO laser and absorption lines of nitrogen oxides

Abstract

Several spectral coincidences between carbon-monoxide laser emission lines and absorption lines of NO and N_2O_4 have been observed, and absorption measurements have been taken. These data are presented and discussed along with similar spectral coincidence observations made previously using the helium-neon and iodine lasers. Other coincidences between CO-laser lines and NO_2 absorption lines are predicted from a study of recently available high-resolution-spectroscopy literature. Due to the narrow line widths of gas-laser lines, the coincidences reported here can be applied to the selective sensing of these constituents in the atmosphere.

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