Abstract
We report on the first analysis of the influence of delayed optical feedback on the spatio-temporal dynamics of spatially extended semiconductor laser devices. We start our investigation with the single-stripe laser, where we discuss analogies and differences to common plane-wave models. In the case of the twin-stripe laser, we find that, depending on parameter values, delayed optical feedback may on the one hand cause spatio-temporal instabilities leading to spatio-temporal chaos, and on the other hand induce coherent regimes in an originally chaotic state.
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