Frequency Up-Conversion of an Intense Laser Beam Producing Gas Ionization in a Cavity K. Hizanidis, J.L. Vomvoridis, J.T. Mendonca et D.J. Frantzeskakis J. Phys. IV France, 05 C6 (1995) C6-13-C6-18 DOI: 10.1051/jp4:1995603