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Extreme events such as rogue wave in optics and fluids are often associatedwith the merging dynamics of coherent structures. We present experimental andnumerical results on the physics of extreme events appearance in a spatiallyextended semiconductor microcavity laser with intracavity saturable absorber.This system can display deterministic irregular dynamics only thanks to spatialcoupling through diffraction of light. We have identified parameter regionswhere extreme events are encountered and established the origin of thisdynamics in the emergence of deterministic spatiotemporal chaos, through thecorrespondence between the proportion of extreme events and the dimension ofthe strange attractor.

Spatiotemporal chaos induces extreme events in an extended microcavity laser