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Updated: Jun 12, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Voltage tunable LiNbO(3) wavelength filters.

J L Jackel, J J Johnson

    Applied Optics
    |June 18, 2010
    PubMed
    Summary

    We developed voltage-tunable wavelength filters using titanium-diffused lithium niobate (LiNbO3). These filters enable efficient cascading for combining or separating multiple optical channels.

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    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science
    • Integrated Optics

    Background:

    • Optical communication systems require precise wavelength control.
    • Existing wavelength filters present limitations in tunability and integration.
    • Lithium niobate (LiNbO3) is a key material for electro-optic devices.

    Purpose of the Study:

    • To design and demonstrate voltage-tunable wavelength filters.
    • To achieve specific channel separations and tuning rates.
    • To explore the cascading potential for multi-channel optical signal processing.

    Main Methods:

    • Fabrication of filters in titanium-diffused LiNbO3.
    • Utilizing a nonsymmetric interferometer design.
    • Characterization of channel separation and tuning rates with applied voltage.

    Main Results:

    • Achieved channel separations of 11-31 nm at 1300 nm wavelength.
    • Demonstrated tuning rates ranging from 3-10 nm/V.
    • Verified the periodic wavelength response suitable for cascading.

    Conclusions:

    • Voltage-tunable filters in LiNbO3 offer efficient optical channel management.
    • The nonsymmetric interferometer design provides practical performance metrics.
    • Cascading capability enhances the potential for complex optical signal routing.

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