T. Bischofberger, E. Courtens
Physical Review A
New results about the self-focusing of gaussian beams in nonlinear index media are presented. The focusing behavior of initially convergent beams is particularly interesting for powers near the critical power. © 1970.
T. Bischofberger, E. Courtens
Physical Review A
E. Sandvold, T. Lægreid, et al.
Physica Scripta
M. Mali, J. Roos, et al.
Ferroelectrics
E. Courtens, R. Vacher, et al.
EPL