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Balancing optical path lengths in broadband fiber interferometers.

J G Burnett, A H Greenaway, R McBride

    Applied Optics
    |November 2, 2010
    PubMed
    Summary

    Controlling dispersion in an all-fiber stellar interferometer is feasible. A control system using temperature and strain can correct errors for high-order precision in stellar interferometry.

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    Area of Science:

    • Astronomy and Astrophysics
    • Optical Engineering

    Background:

    • Stellar interferometry requires precise control of optical path lengths.
    • All-fiber interferometers offer potential advantages but face challenges with dispersion and environmental stability.

    Purpose of the Study:

    • To demonstrate the feasibility of dispersion control in an all-fiber stellar interferometer.
    • To present a model for an interferometer control system capable of high-order error correction.

    Main Methods:

    • Development of a simple theoretical model for an all-fiber stellar interferometer.
    • Simulation of a control system utilizing temperature and strain adjustments.
    • Analysis of error sources including vacuum path differences, fiber length variations, and environmental disparities.

    Main Results:

    • The model confirms that dispersion control is achievable in all-fiber stellar interferometers.
    • A control system employing temperature and strain can effectively balance the interferometer.
    • High-order correction of various error sources is demonstrated within a single polarization mode.

    Conclusions:

    • Dispersion control in all-fiber stellar interferometers is a practical objective.
    • Integrated control systems can significantly enhance the precision of fiber-based interferometry.
    • This approach offers a pathway to more stable and accurate stellar observations.

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