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Fiber-linked telescope array: description and laboratory tests of a two-channel prototype.

J J Alleman, F Reynaud, P Connes

    Applied Optics
    |November 2, 2010
    PubMed
    Summary

    We developed a two-telescope fiber-linked coherent array for radio telescopes using amateur equipment. This system precisely controls guiding, air path difference, and fiber length for advanced astronomical observations.

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    Area of Science:

    • Astronomy and Astrophysics
    • Optical Interferometry
    • Radio Astronomy Instrumentation

    Background:

    • Fiber-linked coherent arrays are crucial for enhancing the resolution of astronomical observations.
    • Existing systems often require large, professional-grade telescopes and complex infrastructure.
    • There is a need for more accessible and adaptable interferometric systems.

    Purpose of the Study:

    • To present a complete two-telescope fiber-linked coherent array system.
    • To demonstrate the feasibility of using amateur telescopes for advanced interferometry.
    • To detail the servo subsystems for precise optical path control.

    Main Methods:

    • Construction of a two-telescope array using 20-cm amateur telescopes.
    • Integration of three servo subsystems: guiding, air path difference nulling, and fiber length control.

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  • Laboratory testing of the fully integrated system with a star simulator.

    • Main Results:

    • Successful assembly and integration of a functional two-telescope fiber-linked coherent array.
    • Demonstration of precise control over guiding, air path difference, and fiber length.
    • Validation of system performance through laboratory star simulator tests.

    Conclusions:

    • A complete, fiber-linked coherent array can be constructed using readily available amateur telescopes.
    • The developed servo subsystems enable precise optical path management for interferometry.
    • This system offers a cost-effective and adaptable platform for astronomical interferometry research.