Abstract

A novel method has been demonstrated for increasing the number of 85Rb trapped atoms in a vapor-cell magneto-optical trap. By using a second set of trapping laser beams overlapped with the original beams and detuned further from resonance, we obtained a doubling of the trap-filling rate as higher initial velocities were slowed. Blocking out the centers of these new beams and reducing the intensity in the original beams also allowed us to obtain a reduction in the light-induced loss rate. Overall we have obtained a fivefold increase in the number of trapped atoms. With 20-mm-diameter beams, ~1.4 × 109 atoms could be trapped. A Gaussian density profile with a peak density of ~2.2 × 1011 cm−3 was observed.

© 1994 Optical Society of America

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