Theoretical and experimental investigations of continuous four-wave mixing and parametric amplification in a resonantly driven double-Λ scheme of Na<sub>2</sub> molecules are reported. Cases of copropagating and counterpropagating pump waves are analyzed. Macroscopic propagation of the generated fields and the interplay of absorption, Raman gain, four-wave mixing, and parametric amplification are studied.
© 2000 Optical Society of America
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.5650) Nonlinear optics : Raman effect
(190.7220) Nonlinear optics : Upconversion
U. Hinze, B. N. Chichkov, E. Tiemann, and B. Wellegehausen, "Resonant continuous four-wave mixing and parametric amplification," J. Opt. Soc. Am. B 17, 2001-2010 (2000)