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Related Experiment Video

Updated: Jun 15, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Efficient optical waveguide coupler.

B L Sopori, C M Phillips, W S Chang

    Applied Optics
    |March 12, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel, high-efficiency method for connecting planar optical waveguides. The technique utilizes mode-matched coupling with a unique etched-step design, achieving near-theoretical efficiencies for diverse waveguide materials.

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    Published on: August 5, 2013

    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science
    • Semiconductor Devices

    Background:

    • Efficient interconnection of planar optical waveguides is crucial for integrated photonic circuits.
    • Existing methods face challenges, especially with large refractive index differences between waveguides.
    • Mode-matched coupling offers a promising approach for high-efficiency interfaces.

    Purpose of the Study:

    • To present a new method for high-efficiency interconnection of dissimilar planar optical waveguides.
    • To provide a theoretical framework for designing and fabricating these couplers.
    • To demonstrate the practical application of this technique with various materials.

    Main Methods:

    • Developing a fabrication process involving etching a deep vertical step in a high-index waveguide.
    • Depositing a low-index waveguide onto the etched section to create a continuous connection.
    • Utilizing mode-matched coupling principles for optimized light transfer.
    • Conducting theoretical analysis for coupler design and tolerance determination.

    Main Results:

    • Successfully fabricated couplers using materials like GaAs, LiNbO(3), glass, and polymer films.
    • Achieved high interconnection efficiencies by precisely controlling the junction profile.
    • Demonstrated that the method is effective even with significant refractive index mismatches.

    Conclusions:

    • The described etched-step, mode-matched coupling technique provides a robust solution for high-efficiency optical waveguide interconnections.
    • This method is versatile, applicable to a range of material combinations.
    • The developed theoretical treatment aids in optimizing coupler performance and understanding fabrication tolerances.