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Opt Lett. 2007 May 1;32(9):1111-3.

Four-wave parametric oscillation in sodium vapor by electromagnetically induced diffraction.

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  • 1Japan Science and Technology Agency, Japan.


We have observed a novel type of parametric oscillation in sodium atomic vapor where four off-axis signal waves simultaneously build up under resonant and counterpropagating pump beams with elliptical beam profiles. The four waves, two of them Stokes shifted and the other two anti-Stokes shifted, have similar output powers of up to 10 mW with a conversion efficiency of 30% and are parametrically coupled by electromagnetically induced diffraction.

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