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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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Complex intensity modulation transfer function for supercontinuum generation in microstructure fibers.

Nils Haverkamp, Harald Telle

    Optics Express
    |May 29, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We studied supercontinuum generation in microstructure fibers (MSF). We observed significant power modulation gain (up to 100x) and limited phase modulation, impacting applications like frequency metrology.

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    Area of Science:

    • Nonlinear Optics
    • Fiber Optics
    • Supercontinuum Generation

    Background:

    • Supercontinuum generation in microstructure fibers (MSF) is crucial for broadband light sources.
    • Understanding intensity modulation transfer functions is key for applications requiring phase coherence.

    Purpose of the Study:

    • To investigate the complex intensity modulation transfer function for supercontinuum generation in MSF.
    • To quantify intensity and phase modulations across the supercontinuum spectrum.

    Main Methods:

    • Measurements of relative intensity and phase modulations in the MSF output spectrum.
    • Utilized spectral resolutions of 1 nm and 10 nm for detailed analysis.

    Main Results:

    • Observed power modulation gain factors as high as 100 in specific spectral regions for low intensity modulation indices (~1%).
    • Phase modulation coefficients remained below 40 rad per percent of pulse power change across all spectral regions.

    Conclusions:

    • The significant power modulation gain suggests potential for enhanced signal manipulation in supercontinuum generation.
    • Limited phase modulation is favorable for applications demanding phase-coherent supercontinua, such as frequency metrology and coherent anti-Stokes Raman scattering (CARS).