Pulse-timing symmetry breaking in an excitable optical system with delay

Excitable systems with delayed feedback are important in areas from biology to neuroscience and optics. They sustain multistable pulsing regimes different number of equidistant pulses the loop. Experimentally theoretically, we report on pulse-timing symmetry breaking these an optical system. A bifurcation analysis unveils that this originates a resonance phenomenon symmetry-broken states stable large regions parameter space. These results have impact photonics for e.g. computing versatile sources pulses.