par Tlidi, Mustapha ;Mandel, Paul
Référence Physical Review A, 59, 4, page (2575-2578)
Publication Publié, 1999
Article révisé par les pairs
Résumé : We study the transverse effects in a degenerate optical parametric oscillator with a saturable absorber. We focus on the analysis of two-dimensional stationary and time-dependent localized patterns. The homogeneous steady-state solution is destabilized by a Hopf bifurcation to periodic states with finite wave number and a Turing bifurcation. These bifurcations are close enough that they interact. This leads to localized structures consisting of a sharp peak emitting concentric rings of alternating high and low intensities.