Low-frequency fluctuations in a semiconductor laser with phase conjugate feedback - art. no. 025802

We analyze the dynamics of a semiconductor laser with phase conjugate optic al feedback, using numerical simulations based on rate equations for the co mplex amplitude of the electric field and the carrier density. From this an alysis we observe the presence of low-frequency fluctuations which are simi lar to those observed in a semiconductor laser with conventional optical fe edback. The similarities and differences between phase conjugate and conven tional optical feedback are discussed, and a mechanism for the appearance o f low-frequency fluctuations in a semiconductor laser with phase conjugate feedback is suggested.