H. Grimm, E. Courtens, et al.
Journal of Non-Crystalline Solids
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.
H. Grimm, E. Courtens, et al.
Journal of Non-Crystalline Solids
E. Courtens, K.A. Müller
EPL
E. Courtens, H. Vogt
Zeitschrift für Physik B Condensed Matter
E. Courtens, R. Vacher
Zeitschrift für Physik B Condensed Matter