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Characterization of spatiotemporal chaos in a Kerr optical frequency comb and in all fiber cavities

par Liu, Zheng;Ouali, Mardia;Coulibaly, Saliya;Clerc, Marcel;T Kint, Ioan-Charly;Tlidi, Mustapha
Référence Optics Letters, 42, page (1063)
Publication Publié, 2017

Article révisé par les pairs

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Résumé :

Complex spatiotemporal dynamics have been a subject of recent experimental investigations in optical frequency comb microresonators and in driven fiber cavities with Kerr-type media. We show that this complex behavior has a spatiotemporal chaotic nature. We determine numerically the Lyapunov spectra, allowing us to characterize different dynamical behavior occurring in these simple devices. The Yorke-Kaplan dimension is used as an order parameter to characterize the bifurcation diagram. We identify a wide regime of parameters where the system exhibits a coexistence between the spatiotemporal chaos, the oscillatory localized structure, and the homogeneous steady state. The destabilization of an oscillatory localized state through radiation of counter-propagating fronts between the homogeneous and the spatiotemporal chaotic states is analyzed. To characterize better the spatiotemporal chaos, we estimate the front speed as a function of the pump intensity.