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Temperature-insensitive Mach-Zehnder interferometer based on a silicon nitride waveguide platform.

Liwei Tang, Yu Li, Jiachen Li

    Optics Letters
    |May 16, 2020
    PubMed
    Summary
    This summary is machine-generated.

    This study optimizes waveguide geometry to create a temperature-insensitive Mach-Zehnder interferometer filter. This silicon nitride device minimizes wavelength shifts for stable photonic systems in dense wavelength division multiplexing.

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    Area of Science:

    • Photonics
    • Optical Engineering
    • Materials Science

    Background:

    • Temperature fluctuations cause critical wavelength shifts in photonic systems, limiting their application.
    • Fabrication errors also contribute to spectral instability in optical devices.

    Purpose of the Study:

    • To minimize wavelength shifts caused by temperature fluctuations and fabrication errors.
    • To propose a temperature-insensitive Mach-Zehnder interferometer filter for wavelength lockers.
    • To ensure device performance for dense wavelength division multiplexing systems.

    Main Methods:

    • Optimizing waveguide geometry.
    • Utilizing silicon nitride as the waveguide material.
    • Designing a Mach-Zehnder interferometer structure.

    Main Results:

    • Achieved a minimal spectral shift of 0.6 pm/K over the C-band.
    • Demonstrated temperature insensitivity crucial for wavelength lockers.
    • Validated the design for dense wavelength division multiplexing applications.

    Conclusions:

    • The proposed silicon nitride Mach-Zehnder interferometer filter effectively minimizes temperature-induced wavelength shifts.
    • The device meets the stringent requirements for wavelength lockers in dense wavelength division multiplexing systems.
    • Optimized waveguide geometry is key to achieving stable photonic device performance.