Ai. Alekseev et Vn. Beloborodov, NONSTATIONARY 2-PHOTON DOPPLER-FREE COHERENT SPECTROSCOPY IN AN ATOMIC GAS IN THE PRESENCE OF DEPOLARIZING COLLISIONS, J. mod. opt., 41(5), 1994, pp. 1015-1026
Non-stationary two-photon absorption coherent spectroscopy free of Dop
pler broadening in an atomic gas has been considered in detail. Correc
t account has been taken of the level degeneracy and depolarizing coll
isions. This two-photon Doppler-free spectroscopy has been developed f
or determining the relaxation rates of the atomic multipole moments in
gas. A criterion to test the adopted model of the depolarizing collis
ions has been developed. A possible method for the identification of t
he atomic transitions in the angular momentum has been formulated. A t
echnique of precisely determining the separation between the energy le
vels of the two-photon transition has been proposed. The conditions un
der which the Stokes wave is conjugated with respect to the probe puls
e in amplitude, phase and polarization have been determined for the at
omic gas in the presence of depolarizing collisions.