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Related Concept Videos

X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
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Writing Bragg Gratings in Multicore Fibers
08:48

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Published on: April 20, 2016

Nonlinear propagation in superstructure Bragg gratings.

B J Eggleton, C M de Sterke, R E Slusher

    Optics Letters
    |October 31, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Solitary waves in superstructure Bragg gratings were experimentally confirmed. Researchers observed nonlinear pulse compression and tunable dispersion, enabling manipulation of transmitted pulse shapes.

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    Area of Science:

    • Optics and Photonics
    • Nonlinear Optics
    • Condensed Matter Physics

    Background:

    • Superstructure Bragg gratings are key components in optical systems.
    • Understanding nonlinear phenomena in these gratings is crucial for advanced optical applications.
    • Theoretical models predicted the existence of solitary waves, but experimental validation was needed.

    Purpose of the Study:

    • To experimentally demonstrate the existence of solitary waves in superstructure Bragg gratings.
    • To investigate the nonlinear compression of optical pulses within these gratings.
    • To explore the tunability of dispersion in superstructure Bragg gratings and its effect on pulse shaping.

    Main Methods:

    • Experimental setup utilizing superstructure Bragg gratings.
    • Generation and propagation of optical pulses through the gratings.
    • Measurement of pulse characteristics, including compression and spectral changes.
    • Systematic variation of grating parameters to tune dispersion.

    Main Results:

    • Experimental confirmation of solitary wave formation in superstructure Bragg gratings.
    • Observation of significant nonlinear pulse compression due to negative grating dispersion and intensity-dependent nonlinear phase shifts.
    • Demonstration of continuously tunable dispersion, ranging from normal to anomalous, within the superstructure Bragg gratings.

    Conclusions:

    • The experimental findings validate theoretical predictions regarding solitary waves in these gratings.
    • Superstructure Bragg gratings offer a versatile platform for controlling optical pulse dynamics.
    • The ability to tune dispersion provides a powerful mechanism for manipulating transmitted pulse shapes in optical systems.