Tadeusz Skalinski
Doppler-free two-photon spectroscopy
Bernard Cagnac
Doppler-free two-photon absorption spectroscopy
N. Bloembergen, M. D. Levenson
Doppler-free two-photon atomic spectroscopy
Maciej Suffczynski
Theory of multiple-pass two-photon Doppler-free spectroscopy
G.H.C. New
Doppler-free two-photon spectroscopy using degenerate four-wave mixing
D. C. Haueisen
Doppler-free two-photon absorption and dispersion spectroscopy with a Fabry-Perot cell
Francois Herlemont, M. Azizi, J. Lemaire