C. Fort et al., DOPPLER-FREE 2-COLOR SPECTROSCOPY OF THE 6(2)S(1 2)-8(2)S(1/2)CESIUM TRANSITION USING SEMICONDUCTOR DIODE-LASERS/, Applied physics. B, Lasers and optics, 61(5), 1995, pp. 467-472
We report an experimental investigation of the 6S-8S transition of ces
ium atoms by using Doppler-free two-color spectroscopy. We consider th
e case in which one of the laser frequencies is nearly resonant with t
he 6S(1/2)-6P(3/2) transition while a second one is swept around the 6
P(3/2)-8S(1/2) transition. The lineshapes of two-photon absorption spe
ctra are analyzed taking into account the effects of saturation and co
llisions. Both counterpropagating and copropagating laser-beam schemes
are studied. Although for the linewidths are broader copropagating be
ams, such a scheme has proved advantageous to fully resolve the hyperf
ine structure of the final state 8S(1/2) and, hence, to measure the di
pole magnetic constant A of this state.