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Related Experiment Video

Updated: Apr 19, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Optical coherence gratings and lattices.

Liyuan Ma, Sergey A Ponomarenko

    Optics Letters
    |December 10, 2014
    PubMed
    Summary

    We introduce optical coherence gratings and lattices, novel light sources with periodic coherence. These sources generate pulses with periodic spectra and directional beams in specific arrangements.

    Area of Science:

    • * Optics
    • * Quantum Optics
    • * Wave Phenomena

    Background:

    • * Partially coherent light sources are crucial in various optical applications.
    • * Understanding and controlling the coherence properties of light is an active research area.
    • * Existing models often focus on fully coherent or fully incoherent light.

    Purpose of the Study:

    • * To introduce a new class of partially coherent optical sources: optical coherence gratings/lattices.
    • * To investigate the unique temporal and spatial coherence properties of these sources.
    • * To demonstrate the resulting spectral and far-zone beam characteristics.

    Main Methods:

    • * Theoretical modeling of partially coherent sources with Gaussian intensity profiles.
    • * Analysis of statistically stationary/homogeneous, periodic temporal/spatial coherence properties.

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  • * Derivation of spectral properties for temporal sources and far-zone patterns for spatial sources.

    • Main Results:

    • * Temporal coherence gratings produce partially coherent pulses with periodic spectra.
    • * Spatial coherence lattices generate far-zone output consisting of periodic lattices of highly directional beams.
    • * The sources exhibit a combination of Gaussian intensity and periodic coherence.

    Conclusions:

    • * Optical coherence gratings/lattices represent a novel class of partially coherent light sources.
    • * These sources offer unique control over spectral content and beam formation.
    • * The findings have potential implications for optical communications, imaging, and beam shaping.