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|Title:||Excitability in optical systems close to Z2-symmetry|
Van der Sande, G.
|Keywords:||semiconductor ring lasers, optical feedback, excitability|
|Abstract:||We report theoretically and experimentally on excitability in semiconductor ring lasers in order to reveal a mechanism of excitability, general for systems close to Z 2-symmetry. The global shapes of the invariant manifolds of a saddle in the vicinity of a homoclinic loop determine the origin of excitability and the features of the excitable pulses. We show how to experimentally make a semiconductor ring laser excitable by breaking the Z 2-symmetry in a controlled way. The experiments confirm the theoretical predictions.|
|Appears in Collections:||Journals|
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