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    Area of Science:

    • Optics and Photonics
    • Optical Metrology

    Background:

    • Chromatic aberrations affect optical system performance by causing wavelength-dependent focal point shifts.
    • Accurate characterization of these aberrations is crucial for designing high-performance optical systems, especially for broadband applications.

    Purpose of the Study:

    • To introduce a simple and effective diagnostic technique for characterizing one-dimensional chromatic aberrations in broadband beams.
    • To demonstrate the method's capability in measuring spectral phase information and delays.

    Main Methods:

    • Utilizing a Ronchi grating placed before a spectrometer entrance slit to couple spectral and spatial phase information.
    • Employing a spectrometer to analyze the dispersed light and extract phase data.

    Main Results:

    • Successfully demonstrated a simple diagnostic for one-dimensional chromatic aberrations.
    • Accurately characterized the radial-group delay of a refractive system.
    • Precisely measured the pulse-front delay of a wedged glass plate.

    Conclusions:

    • The proposed method offers a straightforward approach for diagnosing chromatic aberrations in broadband beams.
    • The technique provides accurate measurements of spectral phase and temporal delays, valuable for optical system characterization.