INJECTION-INDUCED BIFURCATIONS OF TRANSVERSE SPATIOTEMPORAL PATTERNS IN SEMICONDUCTOR-LASER ARRAYS

We present results of numerical investigations on the complex spatiote mporal dynamics of semiconductor laser arrays. The diffusion of charge carriers turns out to be essential for instabilities in the output in tensity above the laser threshold. Besides other bifurcations, a perio d doubling of a torus is found. The Karhunen-Loeve decomposition gives the dominant modes of the spatiotemporal dynamics of the output inten sity and provides a measure of the number of spatiotemporal degrees of freedom.