Theory of optical heterodyne three-level saturation spectroscopy via collinear non-degenerate four-wave mixing in coupled Doppler-broadened transitions S. Le Boiteux, D. Bloch et M. DucloyJ. Phys. France, 47 1 (1986) 31-38DOI: https://doi.org/10.1051/jphys:0198600470103100
