Pairs of pulses from an incoherent source are used to investigate the time-resolved four-wave mixing response of atomic rubidium when a two-photon resonance is involved in the nonlinear process. By varying the relative polarization of the pulse pairs, we are able to select the quantum pathways and clearly distinguish optical and quantum interferences.
© 2005 Optical Society of America
J. Ferraz, D. Felinto, L. H. Acioli, and S. S. Vianna, "Quantum interference in atomic vapor observed by four-wave mixing with incoherent light," Opt. Lett. 30, 1876-1878 (2005)