Self-pulsation in broad area lasers with transverse-mode selective feedback

The influence of the feedback strength on the output intensity dynamics of anti-reflection coated broad area lasers in a Fourier-optical transverse-mode selective external 4f-setup is investigated numerically and experimentally. At certain pump current conditions the broad area laser (BAL) is operating in a repetitive self-Q-switching mode emitting 1-3 ns pulses at repetition rates of 200-500 MHz. Moreover the influence of longitudinal mode conditions on the BAL's output dynamics is investigated.