Bifurcation study of regular pulse packages in laser diodes subject to optical feedback

This study analyzes new dynamics of laser diodes subject to short EC (ν_RO < ν_EC) optical feedback. This dynamics corresponds to packages of high frequency pulses (at ν_EC) that are modulated by slower, periodic envelope (regular pulse packages or RPP). Numerical results are based on the Lang-Kobayashi equations, for the electrical field E(s) = √(P(s))e^iφ(s) and the excess carrier number N. P and φ are the power and the phase of the light wave, time s and the delay time θ are in units of the photon lifetime τ_p.