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High sensitivity active flat optics optical phased array receiver with a two-dimensional aperture.

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    This study introduces a novel optical phased array (OPA) receiver system with an integrated optoelectronic mixer. This innovation enhances sensitivity and enables selective light reception from multiple angles on a chip-scale platform.

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    Area of Science:

    • Integrated photonics
    • Optical phased arrays (OPAs)
    • Receiver system design

    Background:

    • Integrated photonic platforms offer low-cost, chip-scale solutions for various applications.
    • Developing sensitive optical phased array (OPA) receivers is challenging due to low signal levels, noise, and interference.

    Purpose of the Study:

    • To present an integrated receiver system for on-chip adaptive manipulation and processing of optical waveforms.
    • To demonstrate the first functional optical phased array (OPA) receiver with a two-dimensional aperture.

    Main Methods:

    • Incorporation of an optoelectronic mixer for down-converting optical signals to radio frequencies while preserving phase and amplitude.
    • The optoelectronic mixer provides conversion gain, improving system sensitivity and noise robustness.
    • Demonstration of an 8-by-8 element OPA receiver system.

    Main Results:

    • The developed OPA receiver system successfully receives light from 64 distinct angles.
    • Achieved reception beamwidth of 0.75° over an 8° grating-lobe-free field of view.
    • The integrated optoelectronic mixer enhances sensitivity and robustness against noise and interference.

    Conclusions:

    • The presented integrated OPA receiver system overcomes previous sensitivity limitations.
    • This technology enables selective reception of optical signals from multiple angles on a chip.
    • The system demonstrates significant advancements in optical phased array receiver technology.