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Updated: Oct 2, 2025

Implementation of a Reference Interferometer for Nanodetection
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Real-time optical time interpolation using spectral interferometry.

Thomas Fordell

    Optics Letters
    |March 1, 2022
    PubMed
    Summary

    A novel all-optical time interpolation method uses spectral interferometry for single-shot measurements. This technique encodes timing pulse arrival into a supercontinuum spectrum, enabling femtosecond-level timing accuracy.

    Area of Science:

    • Optics and Photonics
    • Precision Measurement

    Background:

    • Accurate time synchronization is crucial for various scientific and technological applications.
    • Current methods for optical time interpolation can be complex and may not support single-shot measurements.

    Purpose of the Study:

    • To introduce a simple, all-optical scheme for time interpolation.
    • To demonstrate the capability of single-shot measurements for precise timing.

    Main Methods:

    • Utilizing spectral interferometry to encode optical pulse arrival times.
    • Employing cross-phase modulation to map time information onto the spectrum of a time-stretched supercontinuum.

    Main Results:

    • Demonstrated a proof-of-concept setup for all-optical time interpolation.

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  • Achieved femtosecond-level absolute timing capabilities.

    • Conclusions:

    • The proposed method offers a straightforward approach to optical time interpolation.
    • The technique requires minimal additions to existing optical clockwork systems, enhancing their precision.