A series of stimulated radiation signals covering from infrared to ultraviolet ranges were generated when atomic ytterbium was pumped to high lying singlet and triplet states with two dye lasers excited simultaneously by a N2 laser using two-step pump. These stimulated lines are from radiative transitions between singlet states, triplet states and singlet-triplet states respectively. The generation processes of these stimulated lines were disscussed in detail.Besides, the ratio of the absorption coefficients between singlet states and singlet-triplet states, and that of probability of collision energy-transfer were measured.