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Related Experiment Video

Updated: Mar 31, 2026

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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Octave-spanning coherent supercontinuum generation in a silicon nitride waveguide.

Adrea R Johnson, Aline S Mayer, Alexander Klenner

    Optics Letters
    |October 30, 2015
    PubMed
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    Researchers generated a broadband, coherent supercontinuum in silicon nitride waveguides using ultrashort laser pulses. This advanced light source shows potential for applications in optical coherence tomography and spectroscopy.

    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science

    Background:

    • Supercontinuum generation is crucial for various optical applications.
    • Silicon nitride (SiN) waveguides offer a promising platform for nonlinear optics due to their transparency and high nonlinearities.

    Purpose of the Study:

    • To demonstrate broadband supercontinuum generation in silicon nitride waveguides.
    • To verify the coherence properties of the generated supercontinuum.

    Main Methods:

    • Utilized sub-100-fs pulses at 1 μm from Ytterbium (Yb) fiber lasers.
    • Employed silicon nitride waveguides for nonlinear propagation.
    • Performed numerical simulations and spectral interference measurements to assess coherence.

    Main Results:

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    • Achieved supercontinuum spanning over 1.4 octaves.
    • Demonstrated full coherence through numerical simulations.
    • Verified high coherence over a broad spectral range using spectral interference measurements with a Yb:CaAlGdO(4) (Yb:CALGO) laser.

    Conclusions:

    • Coherent supercontinuum generation in silicon nitride is feasible with ultrashort pulses.
    • The generated coherent spectrum is suitable for advanced applications.
    • Potential applications include optical coherence tomography, spectroscopy, and frequency metrology.