Atomic, Molecular, and Optical Physics Seminar

Four-Wave Mixing (FWM) is an effective way to generate correlations and entanglement due to the requirements of conservation of energy and momentum. The diamond configuration of the energy levels in rubidium, one ground state 5S_1/2; two excited states 5P_1/2 and 5P_3/2; and one double exited state 6S_1/2, allows the generation of light at telecommunication wavelengths. We investigate the generation of light at telecom wavelengths form the FWM process. We study the temporal correlations of the pairs of photons generated from non-degenerate FWM in rubidium. We observe polarization entanglement of the generated pairs of photons. The frequencies of the two pump lasers used in the spontaneous FWM process modify the time correlations and spectral properties of the generated pairs.