Regenerative spiking oscillation in a semiconductor laser with a nonlinear delayed feedback

Routes to regenerative spiking periodic oscillations are discussed in a delayed-feedback optical bi- stable system consisting of a laser diode interferometer. The observed oscillations have almost the same fundamental period as the delay time or the period of its subharmonics. The dependence of bifurcation routes on the delay time and other control parameters is investigated. The linear stability analysis of the dynamical equation is conducted. The obtained mode distributions show good agreements with the spectral distributions of these spiking oscillations. Numerical simulations for several steady states are also given. They show that such spiking oscillations indeed exist in certain parameter regions.