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Telecommunication-wavelength lasing in a CMOS-compatible tilted-wave design.

Kaixin Liu, Zhongyao Yan, Fengyang Ma

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    This summary is machine-generated.

    We developed a novel tilted-wave laser (TWL) using erbium-doped silicon-rich oxide for on-chip optical communication. This CMOS-compatible light source operates at telecommunication wavelengths, offering a viable solution for silicon photonic integrated circuits.

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    Area of Science:

    • Photonics and Materials Science
    • Integrated Optics
    • Semiconductor Lasers

    Background:

    • Erbium-doped materials are crucial for 1.5 μm telecommunication wavelengths.
    • Silicon photonic integrated circuits (Si PICs) require efficient on-chip light sources.
    • Tilted-wave lasers (TWLs) offer CMOS compatibility for Si PICs.

    Purpose of the Study:

    • To demonstrate telecommunication-wavelength lasing of erbium ions (Er3+) in tilted-wave (TW) modes.
    • To develop a CMOS-compatible on-chip light source for Si PICs.
    • To investigate the performance and characteristics of Er3+-doped TWLs.

    Main Methods:

    • Fabrication of a waveguide-coupled tilted-wave laser (TWL) using Er3+-doped Si-rich oxide.
    • Optical pumping to achieve lasing at the 1.5 μm telecommunication wavelength.
    • Characterization of photoluminescence quantum yield (PLQY), optical net gain, threshold power, and lasing properties.

    Main Results:

    • Achieved telecommunication-wavelength lasing of Er3+ in TW modes with a PLQY of 20.6% and optical net gain of 24.3 dB·cm⁻¹.
    • Demonstrated a low threshold optical pumping power of ~40 mW.
    • Observed edge-emitting photoluminescence consistent with TW mode simulations and remarkable light amplification.

    Conclusions:

    • The Er3+-doped TWL in Si-rich oxide presents a viable on-chip light source for Si PICs.
    • The study provides an optimization pathway for CMOS-compatible telecommunication wavelength light sources.
    • This work advances the integration of light sources into silicon photonics.