Y. Dancheva et al., Coherent effects on the Zeeman sublevels of hyperfine states in optical pumping of Rb by monomode diode laser, OPT COMMUN, 178(1-3), 2000, pp. 103-110
Experimental examination of the coherent population trapping that can be es
tablished on the D-1 and D-2 Lines of Rb at a single hyperfine transition u
sing the Zeeman sublevels of the hyperfine states is reported here. The coh
erent effects have been examined in Hanle configuration, exciting the Rb va
pour in a glass cell by linearly polarized monomode laser beam. Experimenta
l evidence is presented of subnatural width resonances in the fluorescence
and the transmitted through the Rb cell laser power, which are due to the p
rocess of coherent population trapping on the Zeeman sublevels. In case of
degeneracy of the ground level F-g lower than that of the excited level F-e
, bright peaks in the fluorescence and increased absorption have been obser
ved, together with the well known dark resonances for F-g greater than or e
qual to F-e. The peaks in the fluorescence in the Hanle-effect configuratio
n have been observed for the first time. (C) 2000 Published by Elsevier Sci
ence B.V. All rights reserved.