Doppler-free spectroscopy and wave front rotation in the parametric interaction of nonmonochromatic waves
Popov A.K., Shalaev V.M.
A method is proposed for determining the natural widths of Doppler-broadened two-photon transitions by using an excitation whose spectral width greatly exceeds the Doppler width of the transition. The possibility for the effective rotation of the emission wave front with a large spectral width is shown.