Abstract
A dressed atom approach of saturation in degenerate four-wave mixing is presented. Because of the Doppler-shift of the pump and probes waves frequencies, a resonance between levels of the dressed atom occurs for two velocity groups. When the Rabi frequency Ω 1 is smaller than the Doppler width ku, these resonant terms give the essential contribution to the signal which is analytically calculated. When Ω 1 å ku, the signal is expected to be much smaller.
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