Velocity-selective two-photon absorption induced by a diode laser in combination with a train of ultrashort pulses

Marco P. Moreno, Giovana T. Nogueira, Daniel Felinto +1

The two-photon transition $5S-5P-5D$ in rubidium vapor is investigated by detecting the fluorescence from the $6P_{3/2}$ state when the atomic system is excited by the combined act…