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Bewley Lattice Diagram01:12

Bewley Lattice Diagram

The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.

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Periodically segmented waveguides in Ti:LiNbO(3).

D Nir, Z Weissman, S Ruschin

    Optics Letters
    |October 27, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Periodically segmented waveguides in Titanium-indiffused Lithium Niobate (Ti:LiNbO3) show near-field pattern expansion with reduced duty cycles. Segmentation losses depend on duty cycle and period, aligning with a numerical model of waveguide and surface relief losses.

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    Area of Science:

    • Photonics and Waveguide Technology
    • Materials Science in Integrated Optics
    • Lithium Niobate Devices

    Background:

    • Periodically segmented waveguides are crucial for optical device fabrication.
    • Understanding loss mechanisms in Titanium-indiffused Lithium Niobate (Ti:LiNbO3) is essential for device performance.
    • Nonconnected segments introduce unique optical behavior.

    Purpose of the Study:

    • To experimentally investigate the optical characteristics of periodically segmented waveguides in Ti:LiNbO3.
    • To analyze the impact of segmentation period and duty cycle on near-field patterns and losses.
    • To validate experimental findings with a numerical loss model.

    Main Methods:

    • Fabrication of periodically segmented waveguides in Ti:LiNbO3 with varying periods and duty cycles.
    • Experimental measurement of near-field patterns.
    • Quantification of segmentation losses (dB/cm).
    • Development and application of a numerical model incorporating waveguide segmentation and surface relief losses.

    Main Results:

    • Near-field patterns expand as the duty cycle decreases.
    • Near-field patterns are independent of the segmentation period.
    • Measured segmentation losses range from 0.5 to 2.5 dB/cm.
    • Losses are influenced by both segmentation period and duty cycle.

    Conclusions:

    • The study successfully characterized periodically segmented waveguides in Ti:LiNbO3.
    • Experimental results are consistent with a numerical model accounting for waveguide segmentation and Ti indiffusion-induced surface relief.
    • Findings provide valuable insights for optimizing waveguide design and minimizing losses in integrated photonic devices.