Cellular automaton approach to two-dimensional VCSEL array collective behaviour

Previdi F., M. Milani

A Cellular Automaton (CA) is used for modelling a two-dimensional
array of single-mode Vertical Cavity Surface Emitting Laser (VCSEL). Preliminary
results are reported on the dynamics of generation of collective array supermodes. In
particular, coupling of devices has been computed at different values of injection
current; the time evolution of cross-talk among devices has been successfully
simulated even in the case of the presence of a damaged device; fundamental
supermode far-field emission pattern is reported in good agreement with other
analytical approaches and experimental results. The reduced computational cost and
the chance of merging physical parameters with geometrical topologies make the CA
models a useful and powerful complement to classical analytical modelling of complex
interacting optical-device collections.