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Thermo-optical canard-orbits and excitable limit cycles

Marino, F.; Catalan, G.; Sánchez, P. A.; Balle, S.; Piro, O.
Physical Review Letters 92, 073901 (1-4) (2004)

We demonstrate experimentally and theoretically the existence of canard orbits and excitable quasiharmonic limit cycles in the thermo-optical dynamics of semiconductor optical amplifiers. We also observe the phase locking of the noise-induced spikes to the small-amplitude Hopf quasiharmonic oscillations, recently predicted by Makarov, Nekorkin, and Velarde [Phys. Rev. Lett. 86, 3431 (2001)].