Intradoppler spectroscopy of a three-level gas in the field of a frequency modulated traveling wave
Danileiko M. V., Fal' A. M., Fedin V. P., Yatsenko L. P.
A new method of frequency-modulation spectroscopy of a three-level gas, whose resolution is virtually not restricted by transit effects and by the technical fluctuations of the radiation frequency, is proposed and realized experimentally. Using a medium with absorption of 3 χ 10-4 cm~1 and a length of 15 cm, a resolution of 3 Χ 109 was achieved.