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    We developed a new integral field unit for extreme adaptive optics systems, enabling high-resolution astronomical observations at near-infrared wavelengths. This cost-effective instrument enhances telescope capabilities for exploring new scientific frontiers.

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    Area of Science:

    • Astronomy and Astrophysics
    • Optical Instrumentation

    Background:

    • Advanced astronomical observations require instruments capable of resolving fine details.
    • Extreme adaptive optics (ExAO) systems push the limits of ground-based telescope resolution.

    Purpose of the Study:

    • To introduce a novel integral field unit (IFU) for coupling light from the SCExAO facility to a single-mode spectrograph.
    • To enable high-contrast imaging and spectroscopy at near-infrared (NIR) wavelengths with minimal plate scale.

    Main Methods:

    • Designed and integrated a 3D-printed micro-lens array with a custom single-mode multi-core fiber.
    • Coupled the IFU to a spectrograph with off-the-shelf optics for rapid, low-cost development.
    • Conducted on-sky testing with the Subaru Telescope's 8.2 m instrument.

    Main Results:

    • The IFU successfully couples light with minimal plate scale, optimizing light injection into fiber cores.
    • Demonstrated the instrument's potential for high-resolution observations near the diffraction limit.
    • Achieved initial on-sky results validating the instrument's performance.

    Conclusions:

    • The developed IFU is a cost-effective solution for enhancing ExAO system capabilities.
    • This instrument opens new science cases by resolving objects close to the diffraction limit.
    • The rapid development approach allows for timely scientific exploration.