11 research outputs found

    Dispersive properties of quasi-phase-matched optical parametric amplifiers

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    The dispersive properties of non-degenerate optical parametric amplification in quasi-phase-matched (QPM) nonlinear quadratic crystals with an arbitrary grating profile are theoretically investigated in the no-pump-depletion limit. The spectral group delay curve of the amplifier is shown to be univocally determined by its spectral power gain curve through a Hilbert transform. Such a constraint has important implications on the propagation of spectrally-narrow optical pulses through the amplifier. In particular, it is shown that anomalous transit times, corresponding to superluminal or even negative group velocities, are possible near local minima of the spectral gain curve. A possible experimental observation of such effects using a QPM Lithium-Niobate crystal is suggested.Comment: submitted for publicatio

    An Exploration of Questionnaire Sorting and Fuzzy Sorting

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    sorting, cognitive structure, knowledge elicitation, semantic structure, network, fuzzy set, fuzzy cluster analysis, questionnaire sorting, fuzzy sorting, information architecture, web-site structure,

    Electronic Properties of Van Der Waals-Epitaxy Films and Interfaces

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    Literatur

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    Zusammenfassung, Schlussfolgerungen und Ausblick

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