Abstract

A high-spatial-resolution spectroscopic technique (HSRST) is reported. The HSRST can be used for measuring hyperfine splitting of atoms and molecules. The principle of the HSRST is based on the Doppler effect, by which the frequency spectra of the atoms and molecules are translated to a spatial intensity spectra of fluorescence. Measuring the spatial intensity distribution, we can obtain the hyperfine splitting of atoms and molecules. A divergent atomic beam and a divergent laser beam interact with each other in a space; theoretical calculation shows that fluorescence loci of excited atoms and molecules are a series of arcs, and the number of the arcs indicates the number of hyperfine splittings.

© 1984 Optical Society of America