Non-degenerate four-wave mixing in rubidium vapor: transient regime

Details Non-degenerate four-wave mixing in rubidium vapor: transient regime Non-degenerate four-wave mixing in rubidium vapor: transient regime

2010-10-06

arxiv.org/abs/1010.1122v1

Physics

Optics

11 pages, 11 figures, to be published in Physical Review A

Scientific paper

We investigate the transient response of the generated light from Four-Wave Mixing (FWM) in the diamond configuration using a step-down field excitation. The transients show fast decay times and oscillations that depend on the detunings and intensities of the fields. A simplified model taking into account the thermal motion of the atoms, propagation, absorption and dispersion effects shows qualitative agreement with the experimental observations with the energy levels in rubidium (5S1/2, 5P1/2, 5P3/2 and 6S1/2). The atomic polarization comes from all the contributions of different velocity classes of atoms in the ensemble modifying dramatically the total transient behavior of the light from FWM.

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