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Related Experiment Video

Updated: Feb 19, 2026

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
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Compact narrow-linewidth integrated laser based on a low-loss silicon nitride ring resonator.

Brian Stern, Xingchen Ji, Avik Dutt

    Optics Letters
    |November 1, 2017
    PubMed
    Summary

    We developed a compact integrated laser using silicon nitride waveguides and a III-V gain chip. This laser achieves a narrow 13 kHz linewidth with low output power, ideal for integrated photonics.

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    Area of Science:

    • Photonics
    • Materials Science
    • Electrical Engineering

    Background:

    • Integrated lasers are crucial for optical communication and sensing.
    • Achieving narrow linewidths in compact laser designs remains a challenge.
    • Silicon nitride waveguides offer low loss and high confinement for integrated photonic devices.

    Purpose of the Study:

    • To design and demonstrate a compact, narrow-linewidth integrated laser.
    • To leverage silicon nitride waveguides and microring resonators for enhanced laser performance.
    • To achieve a sub-millimeter laser cavity with a narrow linewidth.

    Main Methods:

    • Coupling a III-V gain chip to low-loss silicon nitride waveguides.
    • Utilizing a high-Q microring resonator as a cavity output mirror, filter, and delay element.

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    Last Updated: Feb 19, 2026

    Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
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  • Employing a highly confined optical mode for compact bends and low loss.

    • Main Results:

    • Demonstrated a compact, sub-millimeter silicon nitride laser cavity.
    • Achieved a narrow laser linewidth of 13 kHz.
    • Obtained 1.7 mW output power at approximately 1550 nm wavelength.

    Conclusions:

    • The integrated laser design successfully combines compact size with narrow linewidth.
    • The use of silicon nitride waveguides and microring resonators is effective for high-performance integrated lasers.
    • This work paves the way for advanced integrated photonic systems requiring stable, narrow-linewidth light sources.