Search results for " nonlinearity"

showing 3 items of 33 documents

Measurement of the soliton number in guiding media through continuum generation.

2020

No general approach is available yet to measure directly the ratio between chromatic dispersion and the nonlinear coefficient, and hence the soliton number for a given optical pulse, in an arbitrary guiding medium. Here we solve this problem using continuum generation. We experimentally demonstrate our method in polarization-maintaining and single-mode fibers with positive and negative chromatic dispersion. Our technique also offers new opportunities to determine the chromatic dispersion of guiding media over a broad spectral range while pumping at a fixed wavelength. (C) 2020 Optical Society of America

optical fiberOptical fiberPhysics::Optics02 engineering and technology01 natural scienceslaw.invention010309 opticschromatic dispersionOptics:FÍSICA [UNESCO]law0103 physical sciencesDispersion (optics)supercontinuum generationPhysicsCONTINUOUS-WAVE MEASUREMENT; PHASE-MODULATION METHOD; OPTICAL-FIBERS; SUPERCONTINUUM GENERATION; REFRACTIVE-INDEX; DISPERSION; COEFFICIENT; INTERFEROMETER; NONLINEARITY; COMPRESSIONsoliton propagationContinuum (measurement)business.industrynonlinear opticsUNESCO::FÍSICANonlinear coefficient021001 nanoscience & nanotechnologyAtomic and Molecular Physics and OpticsNonlinear systemWavelengthInterferometry0210 nano-technologybusinessRefractive indexOptics letters
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Some nonlinear aspects of a pulsar magnetosphere

2006

pulsar magnetosphere nonlinearity instabilities turbulence
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Passive Control of Linear Structures Equipped with non-Linear Viscous Dampers and Amplification Mechanism

2008

Fluid damper devices in civil structures such as buildings or bridges are commonly used as energy absorbers for seismic protection. The problem in the response analysis of structures with filled dampers mainly consists in the fact that, due to the strongly nonlinear behavior of such equipments, the response spectrum technique fails. Moreover, in order to enhance the damping effect various toggle brace configurations have been recently proposed. In this paper by using the concept of power spectral density function compatible with the elastic response spectrum and the stochastic linearization technique, the equivalent damping ratio is obtained. It is shown that once the system is linearized r…

viscous dampers nonlinearity seismic protection toggle brace power spectral density stochastic analysisSettore ICAR/08 - Scienza Delle Costruzioni
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