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Related Experiment Video

Updated: Nov 11, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Published on: April 1, 2020

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InP high power monolithically integrated widely tunable laser and SOA array for hybrid integration.

Keith A McKinzie, Cong Wang, Abdullah Al Noman

    Optics Express
    |March 27, 2021
    PubMed
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    We developed a new photonic integrated circuit (PIC) for high-power, narrow-linewidth lasers. This indium phosphide (InP)-based device achieves efficient on-chip beam combination and hybrid integration for advanced photonic applications.

    Area of Science:

    • Photonics
    • Integrated Optics
    • Semiconductor Lasers

    Background:

    • Photonic integrated circuits (PICs) are crucial for miniaturizing optical systems.
    • High-power, narrow-linewidth laser sources are essential for nonlinear integrated photonics.
    • On-chip coherent beam combination offers a pathway to increased optical power.

    Purpose of the Study:

    • To demonstrate a monolithic indium phosphide (InP)-based PIC for high-power laser generation.
    • To achieve stable and efficient on-chip coherent beam combination of multiple amplifiers.
    • To explore hybrid integration with silicon nitride microring resonators for linewidth narrowing.

    Main Methods:

    • Fabrication of a monolithic InP PIC with a tunable laser and amplifier array.
    • On-chip interferometric combination of semiconductor optical amplifiers in a single-mode waveguide.

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    Last Updated: Nov 11, 2025

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  • Hybrid integration with a high-quality factor silicon nitride microring resonator for external cavity feedback.

    • Main Results:

    • Demonstrated stable on-chip coherent beam combination with up to 240 mW average power.
    • Achieved 30-50 kHz Schawlow-Townes linewidths and >180 mW average power across the extended C-band.
    • Hybrid integration yielded a narrowed linewidth of ~3 kHz with 37.9 mW average power.

    Conclusions:

    • The developed InP-based PIC is a promising platform for high-power, narrow-linewidth laser sources.
    • On-chip coherent beam combination is an effective strategy for power scaling.
    • Hybrid integration with microring resonators offers a route to ultra-narrow linewidths for integrated photonics.