Simulating the spiking response of VCSEL-based optical spiking neuron

Abstract Based on the Yamada model and rate equation model of vertical cavity surface emitting laser (VCSEL) with a saturable absorber (SA), we numerically simulate the spiking response of VCSEL–based optical spiking neuron under incoherent and coherent perturbations, respectively. First, we simply analyze the dynamics of the laser system based on the Yamada model. Then we discuss the dependence of spiking characteristics, including threshold, response time, response spike’s amplitude and pulse-width, with the amplitude of perturbations, the driving current of gain and SA region for single optical pulse injection. Finally, we study the dependence of relative refractory period of VCSEL-based optical spiking neuron with different amplitudes of perturbations. Since VCSELs are ease of integration, it provides new opportunities for realization of large-scale and ultrafast neuromorphic computing systems.

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