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Related Experiment Video

Updated: Jun 7, 2025

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16 × 112 Gbps directly modulated membrane laser array for co-packaged interconnects.

Takuro Fujii, Koji Takeda, Yoshiho Maeda

    Optics Express
    |November 14, 2024
    PubMed
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    This study presents a sixteen-channel integrated optical transmitter chip for cost-effective, low-power short-reach communication. The device achieves high bandwidth density and enables 2-km data transmission.

    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics
    • Semiconductor Devices

    Background:

    • Short-reach optical communication demands low-cost, low-power transmitters with high bandwidth density.
    • Integration of multiple optical components, such as lasers, on a single chip is key to achieving this goal.

    Purpose of the Study:

    • To develop a cost-effective, low-power, sixteen-channel optical transmitter array for short-reach optical communication.
    • To enhance bandwidth density (Gbps/mm) through chip integration.

    Main Methods:

    • Fabrication of a sixteen-channel membrane laser array integrated with silica-based spot-size converters on a SiO2/Si substrate.
    • Utilizing a thin (340 nm) membrane buried-heterostructure for high carrier and optical confinement.
    • Direct modulation of the laser array with 28- and 56-GBaud PAM4 signals.

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    Last Updated: Jun 7, 2025

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    Main Results:

    • Achieved a compact footprint of 1.11 × 2.75 mm² for the integrated sixteen-channel laser array.
    • Demonstrated reduced power consumption due to effective carrier and optical confinement.
    • Successfully verified 2-km data transmission feasibility across all sixteen channels.

    Conclusions:

    • The developed integrated membrane laser array offers a promising solution for high-performance, low-cost optical transmitters.
    • The device architecture enables high bandwidth density and low power consumption, suitable for short-reach optical networks.
    • Successful long-reach data transmission validates the potential of this integrated photonic technology.