  Semiconductor lasers with coherent forcing are expected to behave similarly
to simple neuron models in response to external perturbations, as long as the
physics describing them can be approximated by that of an overdamped pendulum
with fluid torque. Beyond the validity range of this approximation, more
complex features can be expected. We perform experiments and numerical
simulations which show that the system can display resonator and integrator
features depending on parameters and that multiple pulses can be emitted in
response to larger perturbations.
