Excitability in optical systems close to Z(2)-symmetry

Beri, S., Mashall, L., Gelens, L., Van der Sande, G., Mezosi, G., Sorel, M. , Danckaert, J. and Verschaffelt, G. (2010) Excitability in optical systems close to Z(2)-symmetry. Physics Letters A, 374(5), pp. 739-743. (doi: 10.1016/j.physleta.2009.11.070)

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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.

Item Type:Articles
Keywords:COHERENCE RESONANCE Excitability fluctuations LASER lasers MECHANISM model noise Nonlinear dynamics optical ring lasers semiconductor Semiconductor ring laser SEMICONDUCTOR RING LASERS SPIKING Stochastic dynamics system
Glasgow Author(s) Enlighten ID:Mezosi, Mr Gabor and Sorel, Professor Marc
Authors: Beri, S., Mashall, L., Gelens, L., Van der Sande, G., Mezosi, G., Sorel, M., Danckaert, J., and Verschaffelt, G.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Physics Letters A
Publisher:Elsevier BV
ISSN (Online):1873-2429

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