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VOLUME 38 (1983) | ISSUE 11 | PAGE 532
Intradoppler spectroscopy of a three-level gas in the field of a frequency modulated traveling wave
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.