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Related Experiment Video

Updated: Jun 16, 2026

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

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Published on: November 30, 2012

Compound optical crosspoint with low crosstalk.

R A Soref, A R Nelson

    Applied Optics
    |February 23, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Researchers demonstrated a multimode electrooptical switch using Z-cut Lithium Tantalate (LiTaO3). This fiber-compatible device offers high channel isolation, crucial for optical matrix integration and advanced photonic applications.

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    Published on: September 5, 2019

    Area of Science:

    • Photonics and optical engineering.
    • Materials science of electro-optic materials.

    Background:

    • Developing high-isolation optical switches is essential for complex integrated photonic circuits.
    • Lithium Tantalate (LiTaO3) is a suitable material for electro-optic devices due to its properties.

    Purpose of the Study:

    • To experimentally demonstrate a novel multimode electro-optical switch.
    • To achieve high isolation between channels in the switch.
    • To assess the feasibility of integrating the switch into optical matrices.

    Main Methods:

    • Fabrication of a 70-microm-thick Z-cut LiTaO3 plate.
    • Design and implementation of a four-port fiber-compatible optical switch.
    • Utilizing an in-plane crossover, two optical switches, and a curved waveguide for the crosspoint.
    • Applying 450-V DC for optical switching control.

    Main Results:

    • Successful experimental demonstration of the multimode electro-optical switch.
    • Achieved high isolation between channels.
    • Observed 10% light transfer into the cross-channel for convergent input light (NA=0.07).
    • Measured an optical switching ratio of 26 dB for the cross-channel.

    Conclusions:

    • The demonstrated LiTaO3 electro-optical switch meets the requirement for high channel isolation.
    • The fiber-compatible design is suitable for integration into optical matrices.
    • The device shows promise for applications in optical switching and signal routing.