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Updated: Sep 28, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Improved cross-talk suppression for digitally enhanced interferometry using Golay complementary pairs.

James T Spollard, Lyle E Roberts, Paul G Sibley

    Optics Letters
    |April 1, 2022
    PubMed
    Summary
    This summary is machine-generated.

    Digitally enhanced interferometry achieves over 100 dB cross-talk suppression using Golay complementary pairs. This significantly surpasses previous methods, improving signal clarity in interferometric measurements.

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    Area of Science:

    • Optics and Photonics
    • Signal Processing

    Background:

    • Interferometry is crucial for precise measurements but susceptible to cross-talk.
    • Conventional methods like maximal length sequences offer limited cross-talk suppression.

    Purpose of the Study:

    • To demonstrate digitally enhanced interferometry with superior cross-talk suppression.
    • To evaluate the performance of Golay complementary pairs in this application.

    Main Methods:

    • Utilizing a combination of numerical simulations and experimental validation.
    • Employing Golay complementary pairs for signal encoding and decoding.

    Main Results:

    • Achieved mean cross-talk suppression exceeding 100 dB.
    • Demonstrated a performance improvement of over 48 dB compared to maximal length sequences.

    Conclusions:

    • Digitally enhanced interferometry with Golay complementary pairs offers unprecedented cross-talk suppression.
    • This technique significantly enhances the fidelity of interferometric measurements.