Abstract

The characteristic feature of the transverse cooling of A atoms (Fig. 1) with coherent population trapping (CPT) is that light pressure force F₂ is of constant sign in a whole range of velocity variation.^1,2 Therefore if atoms with v_z < 0 are declerated, the same force accelerates the atoms with positive velocities, which leads to the considerable loss of final intensity of the atomic beam.

© 1993 Optical Society of America