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    This study introduces a new laser interferometry scheme using strong laser frequency modulations. This method simplifies the construction of interferometers for gravitational wave detection and geodesy.

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    Area of Science:

    • Optics and Photonics
    • Gravitational Wave Astronomy
    • Geophysics

    Background:

    • Laser interferometry is crucial for detecting gravitational waves and in geodesy.
    • Current interferometer designs are complex, requiring numerous components and precise alignment.
    • Existing methods struggle with achieving high precision and dynamic range at low frequencies.

    Purpose of the Study:

    • To present a novel laser interferometry scheme.
    • To simplify the construction and scalability of interferometers.
    • To improve precision and dynamic range at low frequencies.

    Main Methods:

    • Utilizing strong laser frequency modulations.
    • Implementing a deep phase modulation readout algorithm.
    • Developing a new interferometer scheme.

    Main Results:

    • Demonstrated a simpler interferometer construction.
    • Achieved scalability for various applications.
    • Maintained high precision and dynamic range at low frequencies.

    Conclusions:

    • The new scheme offers a more accessible approach to building advanced interferometers.
    • This innovation can benefit future gravitational wave detectors and geodetic measurements.
    • The method facilitates the development of simpler, scalable interferometric systems.