Extensive experimental and numerical investigations of feedback-induced instabilities in single-mode distributed-feedback lasers are presented that confirm the basic assumptions of the Lang–Kobayashi model. We give experimental evidence of the occurrence of low-frequency fluctuation (LFF), alternation between LFF and stable emission, and coherence collapse during single-mode operation of the laser. We have obtained quantitative agreement between modeling and experiment in long-time statistical investigations of the time intervals between subsequent LFF dropouts. In particular, we show that even the dependence of the dynamics on the injection current, which results in a scaling law, is quantitatively identical in modeling and experiment.
© 1999 Optical Society of America
Tilmann Heil, Ingo Fischer, Wolfgang ElÃÂssser, Josep Mulet, and Claudio R. Mirasso, "Statistical properties of low-frequency fluctuations during single-mode operation in distributed-feedback lasers: experiments and modeling," Opt. Lett. 24, 1275-1277 (1999)