1,721,159 research outputs found
Scalar and vector modulational instability induced by parametric resonance in periodically tapered PCFs
No full textWe analyze the modulational instability process induced by periodic variations of the parameters of a PCF along the propagation direction, induced by an analogue of the parametric resonance in mechanics
Roundtrip-to-roundtrip evolution of Faraday and Turing instabilities in dispersion oscillating fiber ring resonators
No full textWe study the roundtrip-to-roundtrip evolution of the output spectrum of a dispersion modulated passive fiber cavity using real time spectroscopy. Our experiments reveal that Faraday and Turing instabilities can be excited independently or coexist
Observation of Turing and Faraday instabilities in a bistable passive resonator
No full textWe experimentally study the occurrence of instabilities in a dispersion oscillating fiber ring cavity. This dispersion profile allows the interplay between the well-known Turing and Faraday instabilities, dramatically affecting the dynamics of the system
Control of nonlinear recurrences in optical fibers by fine tuning of gain
No full textWe demonstrate experimentally the influence of forcing on the nonlinear stage of modulational instability in standard optical fibers. Weak linear amplification via Raman gain is tuned to characterize the separatrix crossing behavior between successive recurrences
Experimental investigation of the noise-driven thermalization of the Fermi-Pasta-Ulam-Tsingou recurrences process
No full textWe demonstrate the noise-driven thermalization of the Fermi-Pasta-Ulam-Tsingou (FPUT) recurrences in optical fibers. We highlight the progressive recurrences breakup in favor of an irreversible spectral energy equipartition by driving the input noise level
Observation of the breaking of a pulse on a weak background in optical fibers
No full textWe experimentally report the observation of dispersive shock waves from a short pulse superimposed to a small cw background in optical fibers. The visibility of intensity oscillations inherent to shock waves is strongly enhanced
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Observation of the symmetry breaking of the Fermi Pasta Ulam recurrence in nonlinear optical fibers
No full textWe provide the first longitudinal characterization in phase and amplitude of the Fermi Pasta Ulam recurrence in optical fibers by means of a heterodyne optical time domain reflectometer. This original setup allows to report the symmetry breaking of the process due to an initial condition change
Progress in nonlinear topographic optical fibers
No full textWe investigate basic nonlinear effects in optical fibers which opto-geometrical parameters oscillate along the propagation axis. These “topographic” fibers provide an additional degree of freedom leading to multiple quasi-phase matched modulation instability side lobes in single pass configuration or in passive cavities. Experimental results are confirmed by analytical and numerical ones
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