The doubly dressed states created by two laser fields in Rb atoms cooled and confined in a magneto-optical trap (MOT) were observed. The three-peaked spectrum was interpreted by the dressed-state picture and agrees well with theoretical calculations-based on a four-level coupled system. The destructive interference in the A-type EIT system, the added pump field created constructive interference between the excitation paths to the doubly dressed states. The experiment demonstrated the versatility of coherent manipulation of multiple atomic states with multiple laser fields in cold atoms.
