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Related Experiment Video

Updated: Mar 19, 2026

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

Xing Liu, Minhao Pu, Binbin Zhou

    Optics Letters
    |June 16, 2016
    PubMed
    Summary

    We demonstrate octave-spanning supercontinuum generation using a simpler silicon-rich nitride waveguide. This material platform enables efficient mid-infrared light generation, offering manufacturing advantages over traditional stoichiometric materials.

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    Area of Science:

    • Photonics
    • Materials Science
    • Nonlinear Optics

    Background:

    • Supercontinuum generation is crucial for various photonic applications.
    • Silicon nitride (SiN) waveguides are widely used for nonlinear optics.
    • Manufacturing challenges exist for stoichiometric SiN waveguides.

    Purpose of the Study:

    • To demonstrate octave-spanning supercontinuum generation in nonstoichiometric silicon-rich nitride waveguides.
    • To explore the potential of this simpler material platform for generating broadband light.
    • To investigate the role of waveguide height in tuning mid-infrared dispersive wave generation.

    Main Methods:

    • Experimental generation of supercontinuum using femtosecond pulses from an erbium fiber laser.
    • Utilizing nonstoichiometric silicon-rich nitride waveguides.

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  • Employing orthogonal pumping to observe wave-breaking supercontinuum.
  • Analyzing the impact of waveguide height on spectral characteristics.

    • Main Results:

    • Achieved octave-spanning supercontinuum generation in nonstoichiometric silicon-rich nitride waveguides.
    • Observed comparable pulse energy and bandwidth to stoichiometric SiN waveguides.
    • Demonstrated wave-breaking supercontinuum generation via orthogonal pumping.
    • Identified waveguide height as a key parameter for tuning mid-infrared dispersive waves.

    Conclusions:

    • Nonstoichiometric silicon-rich nitride offers a simpler and manufacturable platform for supercontinuum generation.
    • This material enables efficient generation of broadband light, including mid-infrared wavelengths.
    • Waveguide engineering, specifically height, provides precise control over spectral properties for tailored light generation.