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    We developed a narrow-linewidth laser using thin-film lithium tantalate (TFLT). This compact, high-coherence laser offers significant potential for integrated photonic applications.

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    Area of Science:

    • Photonics
    • Materials Science
    • Laser Technology

    Background:

    • Integrated photonics requires compact, high-performance laser sources.
    • Thin-film lithium tantalate (TFLT) is a promising material for photonic devices.

    Purpose of the Study:

    • To demonstrate a narrow-linewidth laser utilizing TFLT.
    • To evaluate the performance of a TFLT-based integrated laser.

    Main Methods:

    • Hybrid integration of an InP semiconductor optical amplifier gain chip with a TFLT waveguide.
    • Incorporation of a silicon oxide extended Bragg grating for external cavity feedback.

    Main Results:

    • Achieved an on-chip output power of approximately 26 mW.
    • Demonstrated an intrinsic Lorentzian linewidth of ~94 Hz, indicating narrow linewidth operation.
    • Highlighted the potential of TFLT for compact, high-coherence laser sources.

    Conclusions:

    • TFLT is a viable material for developing high-coherence, high-power integrated photonic lasers.
    • The demonstrated laser design shows promise for advanced photonic applications.