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Vertically coupled GaInAsP--InP microring resonators.

R Grover, P P Absil, V Van

    Optics Letters
    |November 28, 2007
    PubMed
    Summary
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    Vertically coupled microring resonator filters were fabricated without regrowth using a novel waveguide bonding technique. This method enables efficient channel dropping in optical communication systems.

    Area of Science:

    • Photonics
    • Optical Engineering
    • Materials Science

    Background:

    • Vertically coupled microring resonators are key components for optical communication.
    • Fabrication of these devices often requires complex regrowth steps.
    • Efficient channel dropping is crucial for wavelength-division multiplexing.

    Purpose of the Study:

    • To demonstrate vertically coupled microring resonator channel-dropping filters.
    • To present a fabrication method that avoids regrowth.
    • To validate the performance of single-mode, single-ring filters.

    Main Methods:

    • Utilized the GaInAsP-InP material system.
    • Employed a novel technique involving bonding waveguides to a GaAs transfer substrate using benzocyclobutene.

    Related Experiment Videos

  • Achieved optical quality facets via cleaving through the transfer substrate.

    • Main Results:

    • Successfully fabricated vertically coupled waveguides on both sides of the epilayer without regrowth.
    • Demonstrated the operation of single-mode, single-ring optical channel-dropping filters.
    • The fabrication method proved effective for creating high-quality optical devices.

    Conclusions:

    • The demonstrated fabrication technique offers a viable alternative to regrowth for vertically coupled microring resonators.
    • These devices show promise for advanced optical filtering applications.
    • The method facilitates the creation of complex photonic integrated circuits.