J. Phys. Colloques
Volume 48, Numéro C7, Décembre 19871st International Laser M2P Conference
|Page(s)||C7-565 - C7-567|
J. Phys. Colloques 48 (1987) C7-565-C7-567
MULTIPHOTON EXCITATION OF THE XENON NEAR THE 6s' |1/2|1 RESONANT STATE AND THIRD-HARMONIC GENERATIONY. SALAMERO, A. BIROT, H. BRUNET, J. GALY, P. MILLET, J.L. TEYSSIER and J.N. FOULQUIER
Décharges dans les Gaz, Centre de Physique Atomique, Université Paul Sabatier, UA-277, 118, Route de Narbonne, F-31062 Toulouse Cedex, France
The results obtained in a multiphotonic excitation of xenon near the 6s'|1/2|1 state by a tunable pulsed dye laser are presented. At low pressure the lP1 resonnant state of xenon is created by 3-photon resonnant absorption. When the pressure increases, the excitation spectra widen and shift towards shorter wavelengths. We explain this phenomenon by an excitation of the Xe2 molecules in the ground state O+g towards molecular excited state 1u(1P 1 correlated to 1P1 state. A spectral analysis showed the presence in the luminescence of the first and second continuum of xenon. We demonstrated that the third-harmonic generation of the incident laser beam intervenes in the excitation process. This radiation was detected and his pressure dependance studied. The phase matching parameter cXe and the nonlinear susceptibility were measured.