Search results for "Ferroelectric Crystal"

showing 3 items of 3 documents

All-Optical frequency Shifter in a Periodically Poled Lithium Tantalate Waveguide

2011

A frequency shifting device is fabricated and tested in a congruent Lithium Tantalate waveguide. Periodic poling for quasi-phase-matching and channels for operation in the near-infrared C-band were obtained, demonstrating a two-stage parametric conversion.

All-optical wavelength conversion second-harmonic generation difference-frequency generation ferroelectric crystals periodic poling Lithium Tantalate Lithium Niobate.Settore ING-INF/02 - Campi ElettromagneticiSettore ING-INF/01 - Elettronica
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Spatial Simultons in 2D Photonic Crystals of Nonlinear Origin

2007

We observed for the very first time quadratic spatial solitons (simultons) in a two dimensional photonic lattice defined by periodic sign inversion of its susceptibilty. This is the first demonstration of quadratic self-confinement in a 2D purely nonlinear photonic crystal.

Ferroelectric Crystals Nonlinear Optics Spatial solitons Lithium Niobate Cascading Parametric Generation
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Parametric conversion in micrometer and sub-micrometer structured ferroelectric crystals by surface poling

2012

We report on recent technological improvements concerning nonlinear patterning of lithium niobate and lithium tantalate in the micrometer and submicrometer scales using surface periodic poling for ferroelectric domain inversion. The fabricated samples were employed for frequency doubling via quasiphase-matching both in bulk and guided wave geometries, including forward and backward configurations and wavelength conversion in bands C and L. We also investigated short-period quasiperiodic samples with randomly distributed mark-to-space ratios.

Materials scienceSurface PolingLithium niobatePhysics::OpticsSettore ING-INF/01 - ElettronicaFerroelectric Crystalchemistry.chemical_compoundOpticsPeriodic polinglcsh:QC350-467Parametric ConversionupconversionGuided wave testingbusiness.industryPolingparametric generationferroelectricsSettore ING-INF/02 - Campi ElettromagneticiFerroelectricityAtomic and Molecular Physics and OpticsPhoton upconversionElectronic Optical and Magnetic MaterialschemistryQuasiperiodic functionLithium tantalatebusinesslcsh:Optics. Light
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