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Low-Frequency Fluctuations in Semiconductor Ring Lasers With Optical Feedback

Mashal, L.; Nguimdo, R. M.; Van der Sande, G.; Soriano, M. C.; Danckaert, J.; Verschaffelt, G.
IEEE Journal of Quantum Electronics 49, 790-797 (2013)

In this paper, we experimentally and numerically study the dynamics of semiconductor ring lasers that are subjected to long delay and moderate self-feedback. Through varying the pump current or the feedback strength or both, we study the appearance and parameter dependence of low frequency fluctuations in these systems. In particular, we observe different routes to the building up of the initial power amplitude.